Solved papers for NEET NEET SOLVED PAPER 2018

done NEET SOLVED PAPER 2018 Total Questions - 180

• question_answer1) The volume (V) of a monatomic gas varies with its temperature (T), as shown in the graph. The ratio of work done by the gas, to the heat absorbed by it, when it undergoes a change from state A to state B, is [NEET - 2018]
  A)
   \[\frac{1}{3}\]                                   
  done clear
  B)
   \[\frac{2}{3}\]
  done clear
  C)
   \[\frac{2}{5}\]                                   
  done clear
  D)
   \[\frac{2}{7}\]
  done clear
  View Answer play_arrow

• question_answer2) The fundamental frequency in an open organ pipe is equal to the third harmonic of a closed organ pipe. If the length of the closed organ pipe is 20 cm, the length of the open organ pipe is  [NEET - 2018]
  A)
   12.5 cm                     
  done clear
  B)
   8 cm
  done clear
  C)
   13.2 cm                     
  done clear
  D)
   16 cm
  done clear
  View Answer play_arrow

• question_answer3) At what temperature will the rms speed of oxygen molecules become just sufficient for escaping from the Earth's atmosphere? (Given: Mass of oxygen molecule \[\text{(m)=2}\text{.76 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--26}}}\text{kg}\] Boltzmann's constant \[{{\text{k}}_{\text{B}}}\text{=1}\text{.38 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--23}}}\text{J}{{\text{K}}^{\text{--1}}}\text{)}\][NEET - 2018]
  A)
   \[\text{5}\text{.016 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{4}}}\text{ K}\]         
  done clear
  B)
   \[\text{8}\text{.360 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{4}}}\text{ K}\]
  done clear
  C)
   \[\text{2}\text{.508 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{4}}}\text{ K}\]         
  done clear
  D)
   \[\text{1}\text{.254 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{4}}}\text{ K}\]
  done clear
  View Answer play_arrow

• question_answer4) The efficiency of an ideal heat engine working between the freezing point and boiling point of water, is [NEET - 2018]
  A)
   6.25%            
  done clear
  B)
   20%
  done clear
  C)
   26.8%            
  done clear
  D)
   12.5%
  done clear
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• question_answer5) A carbon resistor of\[(47\pm 4.7)\] \[\text{k}\Omega \] is to be marked with rings of different colours for its identification. The colour code sequence will be          [NEET - 2018]
  A)
   Yellow - Green - Violet - Gold
  done clear
  B)
   Yellow - Violet - Orange - Silver
  done clear
  C)
   Violet - Yellow - Orange - Silver
  done clear
  D)
   Green - Orange - Violet - Gold
  done clear
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• question_answer6) A set of 'n' equal resistors, of value 'R' each, are connected in series to a battery of emf 'E' and internal resistance 'R'. The current drawn is I. Now, the 'n' resistors are connected in parallel to the same battery. Then the current drawn from battery becomes 10 I. The value of 'n' is               [NEET - 2018]
  A)
   20                              
  done clear
  B)
   11
  done clear
  C)
   10                              
  done clear
  D)
   9
  done clear
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• question_answer7) A battery consists of a variable number 'n' of identical cells (having internal resistance 'r' each) which are connected in series. The terminals of the battery are short-circuited and the current I is measured. Which of the graphs shows the correct relationship between I and n? [NEET - 2018]
  A)
             
  done clear
  B)
   
  done clear
  C)
           
  done clear
  D)
  
  done clear
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• question_answer8) Unpolarised light is incident from air on a plane surface of a material of refractive index\['\mu '\]. At a particular angle of incidence 'i', it is found that the reflected and refracted rays are perpendicular to each other. Which of the following options is correct for this situation? [NEET - 2018]
  A)
   \[i={{\sin }^{-1}}\left( \frac{1}{\mu } \right)\]
  done clear
  B)
   Reflected light is polarised with its electric vector perpendicular to the plane of incidence
  done clear
  C)
   Reflected light is polarised with its electric vector parallel to the plane of incidence
  done clear
  D)
   \[i={{\tan }^{-1}}\left( \frac{1}{\mu } \right)\]
  done clear
  View Answer play_arrow

• question_answer9) In Young's double slit experiment the separation d between the slits is 2 mm, the wavelength \[\lambda \] of the light used is \[\text{5896}\overset{o}{\mathop{\text{A}}}\,\] and distance D between the screen and slits is 100 cm. It is found that the angular width of the fringes is\[\text{0}\text{.20 }\!\!{}^\circ\!\!\text{ }\]. To increase the fringe angular width to \[\text{0}\text{.21 }\!\!{}^\circ\!\!\text{ }\] (with same \[\lambda \] and D) the separation between the slits needs to be changed to [NEET - 2018]
  A)
   2.1 mm                      
  done clear
  B)
   1.9 mm
  done clear
  C)
   1.8 mm                      
  done clear
  D)
   1.7 mm
  done clear
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• question_answer10) An astronomical refracting telescope will have large angular magnification and high angular resolution, when it has an objective lens of [NEET - 2018]
  A)
   Large focal length and large diameter
  done clear
  B)
   Large focal length and small diameter
  done clear
  C)
   Small focal length and large diameter
  done clear
  D)
   Small focal length and small diameter
  done clear
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• question_answer11) The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is [NEET - 2018]
  A)
   2 : -1              
  done clear
  B)
   1 : -1
  done clear
  C)
   1 : 1               
  done clear
  D)
   1 : -2
  done clear
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• question_answer12) An electron of mass m with an initial velocity\[\overrightarrow{v}={{v}_{0}}\widehat{i}({{v}_{0}}>0)\] enters an electric field\[\overrightarrow{\text{E}}\text{=-}{{\text{E}}_{\text{0}}}\widehat{\text{i}}\text{(}{{\text{E}}_{\text{0}}}\text{=}\]constant > 0) at t = 0. If \[{{\lambda }_{0}}\] is its de-Broglie wavelength initially, then its de-Broglie wavelength at time t is            [NEET - 2018]
  A)
   \[{{\lambda }_{\text{0}}}\text{t}\]                          
  done clear
  B)
   \[{{\lambda }_{0}}\left( 1+\frac{e{{E}_{0}}}{m{{V}_{0}}}t \right)\]
  done clear
  C)
   \[\frac{{{\lambda }_{0}}}{\left( 1+\frac{e{{E}_{0}}}{m{{V}_{0}}}t \right)}\]
  done clear
  D)
   \[{{\lambda }_{0}}\]
  done clear
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• question_answer13) For a radioactive material, half-life is 10 minutes. If initially there are 600 number of nuclei, the time taken (in minutes) for the disintegration of 450 nuclei is                         [NEET - 2018]
  A)
   30                              
  done clear
  B)
   10
  done clear
  C)
   20                              
  done clear
  D)
   15
  done clear
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• question_answer14) When the light of frequency \[2{{v}_{0}}\](where \[{{v}_{0}}\] is threshold frequency), is incident on a metal plate, the maximum velocity of electrons emitted is \[{{v}_{1}}\]. When the frequency of the incident radiation is increased to\[5{{v}_{0}}\], the maximum velocity of electrons emitted from the same plate is \[{{v}_{2}}\]. The ratio of \[{{v}_{1}}\] to \[{{v}_{2}}\] is [NEET - 2018]
  A)
   \[4:1\]             
  done clear
  B)
   \[1:4\]
  done clear
  C)
   \[1:2\]             
  done clear
  D)
   \[2:1\]
  done clear
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• question_answer15) In the circuit shown in the figure, the input voltage \[{{\text{V}}_{\text{i}}}\] is 20 V, \[{{V}_{BE}}=0\]and\[{{V}_{CE}}=0\]. The values of \[{{\text{I}}_{\text{B}}}\text{,}{{\text{I}}_{\text{C}}}\] and \[\beta \] are given by [NEET - 2018]
  A)
   \[{{I}_{B}}=20\mu A,{{I}_{C}}=5mA,\beta =250\]
  done clear
  B)
   \[{{I}_{B}}=25\mu A,{{I}_{C}}=5mA,\beta =200\]
  done clear
  C)
   \[{{I}_{B}}=40\mu A,\,\,{{I}_{C}}=10mA,\,\,\beta =250\]
  done clear
  D)
   \[{{I}_{B}}=40\mu A,\,\,{{I}_{C}}=5mA,\,\,\beta =125\]
  done clear
  View Answer play_arrow

• question_answer16) In a p-n junction diode, change in temperature due to heating                        [NEET - 2018]
  A)
   Does not affect resistance of p-n junction
  done clear
  B)
   Affects only forward resistance
  done clear
  C)
   Affects only reverse resistance
  done clear
  D)
   Affects the overall \[\text{V - l}\]characteristics of p-n junction
  done clear
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• question_answer17) In the combination of the following gates the output Y can be written in terms of inputs A and B as [NEET - 2018]
  A)
   \[\overline{\text{A}\cdot \text{B}}+\text{A}\cdot \text{B}\]
  done clear
  B)
   \[\text{A}\cdot \overline{\text{B}}+\overline{\text{A}}\cdot \text{B}\]
  done clear
  C)
   \[\overline{\text{A}\cdot \text{B}}\]              
  done clear
  D)
   \[\overline{\text{A+B}}\]
  done clear
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• question_answer18) An em wave is propagating in a medium with a velocity\[\overrightarrow{\text{v}}=\text{v}\widehat{\text{i}}\]. The instantaneous oscillating electric field of this em wave is along \[\text{+y}\] axis. Then the direction of oscillating magnetic field of the em wave will be along [NEET - 2018]
  A)
   -y direction                
  done clear
  B)
   +z direction
  done clear
  C)
   -z direction                 
  done clear
  D)
   -x direction
  done clear
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• question_answer19) The refractive index of the material of a prism is \[\sqrt{2}\] and the angle of the prism is\[\text{30 }\!\!{}^\circ\!\!\text{ }\]. One of the two refracting surfaces of the prism is made a mirror inwards, by silver coating. A beam of monochromatic light entering the prism from the other face will retrace its path (after reflection from the silvered surface) if its angle of incidence on the prism is                      [NEET - 2018]
  A)
   \[\text{30 }\!\!{}^\circ\!\!\text{ }\]                
  done clear
  B)
   \[45{}^\circ \]
  done clear
  C)
   \[60{}^\circ \]                                  
  done clear
  D)
   Zero
  done clear
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• question_answer20) An object is placed at a distance of 40 cm from a concave mirror of focal length 15 cm. If the object is displaced through a distance of 20 cm towards the mirror, the displacement of the image will be [NEET - 2018]
  A)
   30 cm towards the mirror
  done clear
  B)
   36 cm away from the mirror
  done clear
  C)
   30 cm away from the mirror
  done clear
  D)
   36 cm towards the mirror
  done clear
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• question_answer21) The magnetic potential energy stored in a certain inductor is 25 mJ, when the current in the inductor is 60 mA. This inductor is of inductance [NEET - 2018]
  A)
   1.389 H                     
  done clear
  B)
   138.88 H
  done clear
  C)
   0.138 H                     
  done clear
  D)
   13.89 H
  done clear
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• question_answer22) An electron falls from rest through a vertical distance h in a uniform and vertically upward directed electric field E. The direction of electric field is now reversed, keeping its magnitude the same. A proton is allowed to fall from rest in it through the same vertical distance h. The time of fall of the electron, in comparison to the time of fall of the proton is  [NEET - 2018]
  A)
   10 times greater         
  done clear
  B)
   5 times greater
  done clear
  C)
   Smaller                      
  done clear
  D)
   Equal
  done clear
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• question_answer23) The electrostatic force between the metal plates of an isolated parallel plate capacitor C having a charge Q and area A, is [NEET - 2018]
  A)
   Proportional to the square root of the distance between the plates
  done clear
  B)
   Linearly proportional to the distance between the plates
  done clear
  C)
   Independent of the distance between the plates
  done clear
  D)
   Inversely proportional to the distance between the plates
  done clear
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• question_answer24) A tuning fork is used to produce resonance in a glass tube. The length of the air column in this tube can be adjusted by a variable piston. At room temperature of \[\text{27 }\!\!{}^\text{o}\!\!\text{ C}\] two successive resonances are produced at 20 cm and 73 cm of column length. If the frequency of the tuning fork is 320 Hz, the velocity of sound in air at \[\text{27 }\!\!{}^\text{o}\!\!\text{ C}\] is      [NEET - 2018]
  A)
   350 m/s                      
  done clear
  B)
   339 m/s
  done clear
  C)
   330 m/s                      
  done clear
  D)
   300 m/s
  done clear
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• question_answer25) A pendulum is hung from the roof of a sufficiently high building and is moving freely to and fro like a simple harmonic oscillator. The acceleration of the bob of the pendulum is \[20\text{ }m/{{s}^{2}}\]at a distance of 5 m from the mean position. The time period of oscillation is [NEET - 2018]
  A)
   \[\text{2s}\]                            
  done clear
  B)
   \[\pi \text{s}\]
  done clear
  C)
   \[2\pi \text{s}\]                                   
  done clear
  D)
   \[1\text{s}\]
  done clear
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• question_answer26) A metallic rod of mass per unit length \[0.5\text{ }kg\text{ }{{m}^{1}}\] is lying horizontally on a smooth inclined plane which makes an angle of \[30{}^\circ \] with the horizontal. The rod is not allowed to slide down by flowing a current through it when a magnetic field of induction 0.25 T is acting on it in the vertical direction. The current flowing in the rod to keep it stationary is [NEET - 2018]
  A)
   \[\text{14}\text{.76 A}\]                    
  done clear
  B)
   \[\text{5}\text{.98 A}\]
  done clear
  C)
   \[\text{7}\text{.14 A}\]                      
  done clear
  D)
   \[\text{11}\text{.32 A}\]
  done clear
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• question_answer27) A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diamagnetic rod is pushed up, out of the horizontal magnetic field. Hence the rod gains gravitational potential energy. The work required to do this comes from [NEET - 2018]
  A)
   The lattice structure of the material of the rod
  done clear
  B)
   The magnetic field
  done clear
  C)
   The current source
  done clear
  D)
   The induced electric field due to the changing magnetic field
  done clear
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• question_answer28) An inductor 20 mH, a capacitor \[100\text{ }\mu \text{F}\] and a resistor \[50\text{ }\Omega \]are connected in series across a source of emf, V=10 sin 314 t. The power loss in the circuit is [NEET - 2018]
  A)
   2.74 W                       
  done clear
  B)
   0.43 W
  done clear
  C)
   0.79 W                       
  done clear
  D)
   1.13 W
  done clear
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• question_answer29) Current sensitivity of a moving coil galvanometer is 5 div/mA and its voltage sensitivity (angular deflection per unit voltage applied) is 20 div/V. The resistance of the galvanometer is [NEET - 2018]
  A)
   \[250\,\,\Omega \]                  
  done clear
  B)
   \[25\,\,\Omega \]
  done clear
  C)
   \[40\,\,\Omega \]                    
  done clear
  D)
   \[500\,\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer30) A body initially at rest and sliding along a frictionless track from a height h (as shown in the figure) just completes a vertical circle of diameter\[\text{AB=D}\]. The height h is equal to [NEET - 2018]
  A)
   \[\frac{7}{5}D\]                    
  done clear
  B)
   \[D\]
  done clear
  C)
   \[\frac{3}{2}D\]                    
  done clear
  D)
   \[\frac{5}{4}D\]
  done clear
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• question_answer31) Three objects, A : (a solid sphere), B : (a thin circular disk) and C : (a circular ring), each have the same mass M and radius R. They all spin with the same angular speed \[\omega \] about their own symmetry axes. The amounts of work (W) required to bring them to rest, would satisfy the relation [NEET - 2018]
  A)
   \[{{\text{W}}_{\text{B}}}\text{}{{\text{W}}_{\text{A}}}\text{}{{\text{W}}_{\text{C}}}\]     
  done clear
  B)
   \[{{\text{W}}_{\text{A}}}\text{}{{\text{W}}_{\text{B}}}\text{}{{\text{W}}_{\text{C}}}\]
  done clear
  C)
   \[{{\text{W}}_{\text{C}}}\text{}{{\text{W}}_{\text{B}}}\text{}{{\text{W}}_{\text{A}}}\]     
  done clear
  D)
   \[{{\text{W}}_{\text{A}}}\text{}{{\text{W}}_{\text{C}}}\text{}{{\text{W}}_{\text{B}}}\]
  done clear
  View Answer play_arrow

• question_answer32) A moving block having mass m, collides with another stationary block having mass 4m. The lighter block comes to rest after collision. When the initial velocity of the lighter block is v, then the value of coefficient of restitution (e) will be [NEET - 2018]
  A)
   0.8                             
  done clear
  B)
   0.25
  done clear
  C)
   0.5                             
  done clear
  D)
   0.4
  done clear
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• question_answer33) Which one of the following statements is incorrect?     [NEET - 2018]
  A)
   Frictional force opposes the relative motion.
  done clear
  B)
   Limiting value of static friction is directly proportional to normal reaction.
  done clear
  C)
   Rolling friction is smaller than sliding friction.
  done clear
  D)
   Coefficient of sliding friction has dimensions of length.
  done clear
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• question_answer34) A toy car with charge q moves on a frictionless horizontal plane surface under the influence of a uniform electric field\[\overrightarrow{\text{E}}\]. Due to the force q\[\overrightarrow{\text{E}}\], its velocity increases from 0 to 6 m/s in one second duration. At that instant the direction of the field is reversed. The car continues to move for two more seconds under the influence of this field. The average velocity and the average speed of the toy car between 0 to 3 seconds are respectively [NEET - 2018]
  A)
   1 m/s, 3.5 m/s
  done clear
  B)
   1 m/s, 3 m/s
  done clear
  C)
   2 m/s, 4 m/s               
  done clear
  D)
   1.5 m/s, 3 m/s
  done clear
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• question_answer35) A block of mass m is placed on a smooth inclined wedge ABC of inclination \[\theta \] as shown in the figure. The wedge is given an acceleration 'a' towards the right. The relation between a and \[\theta \] for the block to remain stationary on the wedge is [NEET - 2018]
  A)
   \[a=g\,\,\cos \theta \]              
  done clear
  B)
   \[a=\frac{g}{\sin \theta }\]
  done clear
  C)
   \[a=\frac{g}{\text{cosec}\theta }\]               
  done clear
  D)
   \[a=g\tan \theta \]
  done clear
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• question_answer36) The moment of the force, \[\overrightarrow{\text{F}}\text{=4}\widehat{\text{i}}\text{+5}\widehat{\text{j}}\text{-6}\widehat{\text{k}}\] at (2, 0, -3), about the point (2, -2, -2), is given by [NEET - 2018]
  A)
   \[\text{-7}\widehat{\text{i}}\text{-8}\widehat{\text{j}}\text{-4}\widehat{\text{k}}\]                     
  done clear
  B)
   \[\text{-4}\widehat{\text{i}}\text{-}\widehat{\text{j}}\text{-8}\widehat{\text{k}}\]
  done clear
  C)
   \[\text{-8}\widehat{\text{i}}\text{-4}\widehat{\text{j}}\text{-7}\widehat{\text{k}}\]                     
  done clear
  D)
   \[\text{-7}\widehat{\text{i}}\text{-4}\widehat{\text{j}}\text{-8}\widehat{\text{k}}\]
  done clear
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• question_answer37) A student measured the diameter of a small steel ball using a screw gauge of least count 0.001 cm. The main scale reading is 5 mm and zero of circular scale division coincides with 25 divisions above the reference level. If screw gauge has a zero error of -0.004 cm, the correct diameter of the ball is [NEET - 2018]
  A)
   0.053 cm                   
  done clear
  B)
   0.525 cm
  done clear
  C)
   0.521 cm                   
  done clear
  D)
   0.529 cm
  done clear
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• question_answer38) A solid sphere is rotating freely about its symmetry axis in free space. The radius of the sphere is increased keeping its mass same. Which of the following physical quantities would remain constant for the sphere? [NEET - 2018]
  A)
   Rotational kinetic energy
  done clear
  B)
   Moment of inertia
  done clear
  C)
   Angular velocity
  done clear
  D)
   Angular momentum
  done clear
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• question_answer39) The kinetic energies of a planet in an elliptical orbit about the Sun, at positions A, B and C are\[{{\text{K}}_{\text{A}}}\], \[{{\text{K}}_{\text{B}}}\] and\[{{\text{K}}_{\text{C}}}\], respectively. AC is the major axis and SB is perpendicular to AC at the position of the Sun S as shown in the figure. Then                         [NEET - 2018]
  A)
   \[{{\text{K}}_{\text{B}}}\text{}{{\text{K}}_{\text{A}}}\text{}{{\text{K}}_{\text{C}}}\]         
  done clear
  B)
   \[{{\text{K}}_{\text{A}}}\text{}{{\text{K}}_{\text{B}}}\text{}{{\text{K}}_{\text{C}}}\]
  done clear
  C)
   \[{{\text{K}}_{\text{A}}}\text{}{{\text{K}}_{\text{B}}}\text{}{{\text{K}}_{\text{C}}}\]         
  done clear
  D)
   \[{{\text{K}}_{\text{B}}}\text{}{{\text{K}}_{\text{A}}}\text{}{{\text{K}}_{\text{C}}}\]
  done clear
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• question_answer40) If the mass of the Sun were ten times smaller and the universal gravitational constant were ten times larger in magnitude, which of the following is not correct? [NEET - 2018]
  A)
   Time period of a simple pendulum on the Earth would decrease
  done clear
  B)
   Walking on the ground would become more difficult
  done clear
  C)
   Raindrops will fall faster
  done clear
  D)
   'g' on the Earth will not change
  done clear
  View Answer play_arrow

• question_answer41) A solid sphere is in rolling motion. In rolling motion a body possesses translational kinetic energy \[\text{(}{{\text{K}}_{\text{t}}}\text{)}\] as well as rotational kinetic energy \[\text{(}{{\text{K}}_{\text{r}}}\text{)}\] simultaneously. The ratio\[{{\text{K}}_{\text{t}}}\text{:(}{{\text{K}}_{\text{t}}}\text{+}{{\text{K}}_{\text{r}}}\text{)}\] for the sphere is [NEET - 2018]
  A)
   10 : 7             
  done clear
  B)
   5 : 7
  done clear
  C)
   7 : 10             
  done clear
  D)
  2 : 5
  done clear
  View Answer play_arrow

• question_answer42) A small sphere of radius 'r' falls from rest in a viscous liquid. As a result, heat is produced due to viscous force. The rate of production of heat when the sphere attains its terminal velocity, is proportional to [NEET - 2018]
  A)
   \[{{\text{r}}^{\text{5}}}\]                          
  done clear
  B)
   \[{{\text{r}}^{\text{2}}}\]
  done clear
  C)
   \[{{\text{r}}^{\text{3}}}\]                          
  done clear
  D)
   \[{{\text{r}}^{\text{4}}}\]
  done clear
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• question_answer43) The power radiated by a black body is P and it radiates maximum energy at wavelength, \[{{\lambda }_{0}}\]. If the temperature of the black body is now changed so that it radiates maximum energy at wavelength\[\frac{3}{4}{{\lambda }_{0}}\], the power radiated by it becomes\[\text{nP}\]. The value of n is [NEET - 2018]
  A)
   \[\frac{256}{81}\]                 
  done clear
  B)
   \[\frac{4}{3}\]
  done clear
  C)
   \[\frac{3}{4}\]                                   
  done clear
  D)
   \[\frac{81}{256}\]
  done clear
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• question_answer44) Two wires are made of the same material and have the same volume. The first wire has cross-sectional area A and the second wire has cross-sectional area 3A. If the length of the first wire is increased by \[\Delta /\]on applying a force F, how much force is needed to stretch the second wire by the same amount? [NEET - 2018]
  A)
   4 F                             
  done clear
  B)
   6 F
  done clear
  C)
   9 F                             
  done clear
  D)
   F
  done clear
  View Answer play_arrow

• question_answer45) A sample of 0.1 g of water at \[\text{100 }\!\!{}^\circ\!\!\text{ C}\] and normal pressure \[\text{(1}\text{.013 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{5}}}\text{N}{{\text{m}}^{\text{--2}}}\text{)}\] requires 54 cal of heat energy to convert to steam at\[\text{100 }\!\!{}^\circ\!\!\text{ C}\]. If the volume of the steam produced is 167.1 cc, the change in internal energy of the sample, is [NEET - 2018]
  A)
   42.2 J            
  done clear
  B)
   208.7 J
  done clear
  C)
   104.3 J                      
  done clear
  D)
   84.5 J
  done clear
  View Answer play_arrow

• question_answer46) The correct order of N-compounds in its decreasing order of oxidation states is [NEET - 2018]
  A)
   \[\text{HN}{{\text{O}}_{\text{3}}}\text{,N}{{\text{H}}_{\text{4}}}\text{Cl,NO,}{{\text{N}}_{\text{2}}}\]
  done clear
  B)
   \[\text{HN}{{\text{O}}_{\text{3}}}\text{,NO,N}{{\text{H}}_{\text{4}}}\text{Cl,}{{\text{N}}_{\text{2}}}\]
  done clear
  C)
   \[\text{HN}{{\text{O}}_{\text{3}}}\text{,NO,}{{\text{N}}_{\text{2}}}\text{,N}{{\text{H}}_{\text{4}}}\text{Cl}\]
  done clear
  D)
   \[\text{N}{{\text{H}}_{\text{4}}}\text{Cl,}{{\text{N}}_{\text{2}}}\text{,NO,HN}{{\text{O}}_{\text{3}}}\]
  done clear
  View Answer play_arrow

• question_answer47) Which one of the following elements is unable to form\[\text{MF}_{\text{6}}^{\text{3-}}\text{ion}\]? [NEET - 2018]
  A)
   B                                
  done clear
  B)
   Al
  done clear
  C)
   Ga                             
  done clear
  D)
   In
  done clear
  View Answer play_arrow

• question_answer48) Considering Ellingham diagram, which of the following metals can be used to reduce alumina? [NEET - 2018]
  A)
   Mg                             
  done clear
  B)
   Zn
  done clear
  C)
   Fe                              
  done clear
  D)
   Cu
  done clear
  View Answer play_arrow

• question_answer49) The correct order of atomic radii in group 13 elements is                    [NEET - 2018]
  A)
   \[\text{BGaAlTlIn}\]
  done clear
  B)
   \[\text{BAlGaInTl}\]
  done clear
  C)
   \[\text{BAlInGaTl}\]
  done clear
  D)
   \[\text{BGaAlInTl}\]
  done clear
  View Answer play_arrow

• question_answer50) Which of the following statements is not true for halogens?     [NEET - 2018]
  A)
   All but fluorine show positive oxidation states
  done clear
  B)
   All are oxidizing agents
  done clear
  C)
   All form monobasic oxyacid
  done clear
  D)
   Chlorine has the highest electron-gain enthalpy
  done clear
  View Answer play_arrow

• question_answer51) In the structure of \[\text{Cl}{{\text{F}}_{\text{3}}}\], the number of lone pair of electrons on central atom \[\text{ }\!\!'\!\!\text{ Cl }\!\!'\!\!\text{ }\] is [NEET - 2018]
  A)
   Four               
  done clear
  B)
   Two
  done clear
  C)
   One                           
  done clear
  D)
   Three
  done clear
  View Answer play_arrow

• question_answer52) Identify the major products P, Q and R in the following sequence of reactions: [NEET - 2018]
  A)

  P	Q	R

  done clear
  B)

  P	Q	R

     
  done clear
  C)

  P	Q	R

  done clear
  D)

  P	Q	R

  done clear
  View Answer play_arrow

• question_answer53) Which of the following compounds can form a zwitterion?      [NEET - 2018]          
  A)
   Benzoic acid  
  done clear
  B)
   Acetanilide
  done clear
  C)
   Aniline                       
  done clear
  D)
   Glycine
  done clear
  View Answer play_arrow

• question_answer54) Regarding cross-linked or network polymers, which of the following statements is incorrect? [NEET - 2018]
  A)
   Examples are bakelite and melamine.
  done clear
  B)
   They are formed from bi- and tri-functional monomers.
  done clear
  C)
   They contain covalent bonds between various linear polymer chains.
  done clear
  D)
   They contain strong covalents bonds in their polymer chains.
  done clear
  View Answer play_arrow

• question_answer55) Nitration of aniline in strong acidic medium also gives m-nitroaniline because [NEET - 2018]
  A)
   In absence of substituents nitro group always goes to m-position.
  done clear
  B)
   In electrophilic substitution reactions amino group is meta directive.
  done clear
  C)
   Inspite of substituents nitro group always goes to only m-position.
  done clear
  D)
   In acidic (strong) medium aniline is present as anilinium ion.
  done clear
  View Answer play_arrow

• question_answer56) The difference between amylose and amylopectin is                [NEET - 2018]
  A)
   Amylopectin have 1\[\to \]4 \[\alpha \]-linkage and 1\[\to \]6 \[\beta \]-linkage
  done clear
  B)
   Amylose have 1\[\to \]4 \[\alpha \]-linkage and 1\[\to \]6 \[\beta \]-linkage
  done clear
  C)
   Amylopectin have 1\[\to \]4 \[\alpha \]-linkage and 1\[\to \]6\[\alpha \]-linkage
  done clear
  D)
   Amylose is made up of glucose and galactose
  done clear
  View Answer play_arrow

• question_answer57) A mixture of 2.3 g formic acid and 4.5 g oxalic acid is treated with conc. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{o}}_{\text{4}}}\]. The evolved gaseous mixture is passed through KOH pellets. Weight (in g) of the remaining product at STP will be     [NEET - 2018]
  A)
   2.8                             
  done clear
  B)
   3.0
  done clear
  C)
   1.4                             
  done clear
  D)
   4.4
  done clear
  View Answer play_arrow

• question_answer58) Which of the following oxides is most acidic in nature?           [NEET - 2018]
  A)
   \[\text{BaO}\]            
  done clear
  B)
   \[\text{BeO}\]
  done clear
  C)
   \[\text{MgO}\]           
  done clear
  D)
   \[\text{CaO}\]
  done clear
  View Answer play_arrow

• question_answer59) Which oxide of nitrogen is not a common pollutant introduced into the atmosphere both due to natural and human activity? [NEET - 2018]
  A)
   \[{{\text{N}}_{\text{2}}}\text{O}\]            
  done clear
  B)
   \[\text{N}{{\text{O}}_{2}}\]
  done clear
  C)
   \[{{\text{N}}_{\text{2}}}{{\text{O}}_{\text{5}}}\]                      
  done clear
  D)
   \[\text{NO}\]
  done clear
  View Answer play_arrow

• question_answer60) The compound A on treatment with Na gives B, and with \[\text{PC}{{\text{l}}_{\text{5}}}\] gives C. B and C react together to give diethyl ether. A, B and C are in the order                       [NEET - 2018]
  A)
   \[{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{Cl, }{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\text{,}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH}\]
  done clear
  B)
   \[{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH, }{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{Cl,}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{ONa}\]
  done clear
  C)
   \[{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH,}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{6}}}\text{,}{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{Cl}\]
  done clear
  D)
   \[{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{OH, }{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{ONa, }{{\text{C}}_{\text{2}}}{{\text{H}}_{\text{5}}}\text{Cl}\]
  done clear
  View Answer play_arrow

• question_answer61) The compound \[{{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\] undergoes the following reactions\[:{{\text{C}}_{\text{7}}}{{\text{H}}_{\text{8}}}\xrightarrow{3C{{l}_{2}}/\Delta }A\xrightarrow{B{{r}_{2}}/Fe}B\xrightarrow{Zn/HCl}C\]. The product 'C' is [NEET - 2018]
  A)
   3-bromo-2, 4, 6-trichlorotoluene
  done clear
  B)
   o-bromotoluene
  done clear
  C)
   m-bromotoluene
  done clear
  D)
   p-bromotoluene
  done clear
  View Answer play_arrow

• question_answer62) Hydrocarbon [A] reacts with bromine by substitution to form an alkyl bromide which by Wurtz reaction is converted to gaseous hydrocarbon containing less than four carbon atoms. [A] is          [NEET - 2018]
  A)
   \[\text{C}{{\text{H}}_{\text{3}}}\text{-C}{{\text{H}}_{\text{3}}}\]                  
  done clear
  B)
   \[\text{C}{{\text{H}}_{\text{2}}}\text{=C}{{\text{H}}_{\text{2}}}\]
  done clear
  C)
   \[\text{CH}\equiv \text{CH}\]                       
  done clear
  D)
   \[\text{C}{{\text{H}}_{\text{4}}}\]
  done clear
  View Answer play_arrow

• question_answer63) Which of the following molecules represents the order of hybridisation \[\text{s}{{\text{p}}^{\text{2}}}\text{, s}{{\text{p}}^{\text{2}}}\text{, sp, sp}\]from left to right atoms?               [NEET - 2018]
  A)
   \[\text{C}{{\text{H}}_{\text{2}}}\text{=CH-CH=C}{{\text{H}}_{\text{2}}}\]
  done clear
  B)
   \[\text{C}{{\text{H}}_{\text{2}}}\text{=CH-C}\equiv \text{CH}\]
  done clear
  C)
   \[\text{HC}\equiv \text{C-C}\equiv \text{CH}\]
  done clear
  D)
   \[\text{C}{{\text{H}}_{\text{3}}}\text{-CH=CH-C}{{\text{H}}_{\text{3}}}\]
  done clear
  View Answer play_arrow

• question_answer64) Which of the following carbocation?s is expected to be most stable? [NEET - 2018]
  A)
   
  done clear
  B)
   
  done clear
  C)
                   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer65) Which of the following is correct with respect to - I effect of the substituents? (R = alkyl)                         [NEET - 2018]
  A)
   \[\text{-N}{{\text{H}}_{\text{2}}}\text{-OR-F}\]  
  done clear
  B)
   \[\text{-N}{{\text{R}}_{\text{2}}}\text{-OR-F}\]
  done clear
  C)
   \[\text{-N}{{\text{H}}_{\text{2}}}\text{-OR-F}\]  
  done clear
  D)
   \[\text{-N}{{\text{R}}_{\text{2}}}\text{-OR-F}\]
  done clear
  View Answer play_arrow

• question_answer66) In the reaction. The electrophile involved is [NEET - 2018]
  A)
   Dichloromethyl anion \[\left( \begin{align}   & \oplus  \\  & \text{CHC}{{\text{l}}_{\text{2}}} \\ \end{align} \right)\]
  done clear
  B)
   Formyl cation \[\left( \begin{align}   & \oplus  \\  & \text{CHO} \\ \end{align} \right)\]
  done clear
  C)
   Dichloromethyl cation \[\left( \begin{align}   & \oplus  \\  & \text{CHC}{{\text{l}}_{2}} \\ \end{align} \right)\]
  done clear
  D)
   Dichlorocarbene \[\text{(:CC}{{\text{l}}_{\text{2}}})\]
  done clear
  View Answer play_arrow

• question_answer67) Carboxylic acids have higher boiling points than aldehydes, ketones and even alcohols of comparable molecular mass. It is due to their [NEET - 2018]
  A)
   More extensive association of carboxylic acid via van der Waals force of attraction
  done clear
  B)
   Formation of carboxylate ion
  done clear
  C)
   Formation of intramolecular H-bonding
  done clear
  D)
   Formation of intermolecular H-bonding
  done clear
  View Answer play_arrow

• question_answer68) Compound \[\text{A,}{{\text{C}}_{\text{8}}}{{\text{H}}_{\text{10}}}\text{O,}\] is found to react with \[\text{NaOI}\] (produced by reacting Y with\[\text{NaOH}\]) and yields a yellow precipitate with characteristic smell. A and Y are respectively [NEET - 2018]
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer69) Match the metal ions given in Column I with the spin magnetic moments of the ions given in Column II and assign the correct code:                         [NEET - 2018]

  Column I	Column II
  a. \[\text{C}{{\text{o}}^{\text{3+}}}\]	i. \[\sqrt{\text{8}}\text{ BM}\]
  b. \[\text{C}{{\text{r}}^{\text{3+}}}\]	ii. \[\sqrt{35}\text{ }BM\]
  c. \[\text{F}{{\text{e}}^{\text{3+}}}\]	iii. \[\sqrt{3}\text{ }BM\]
  d. \[\text{N}{{\text{i}}^{\text{2+}}}\]	iv. \[\sqrt{24}\text{ }BM\]
  	v. \[\sqrt{15}\text{ }BM\]

  A)
              a-iv      b-i        c-ii       d-iii
  done clear
  B)
              a-I        b-ii       c-iii      d-iv
  done clear
  C)
              a-iv      b-v       c-ii       d-i
  done clear
  D)
              a-iii      b-v       c-I        d-ii
  done clear
  View Answer play_arrow

• question_answer70) Which one of the following ions exhibits d-d transition and paramagnetism as well? [NEET - 2018]
  A)
   \[\text{MnO}_{\text{4}}^{\text{-}}\]                     
  done clear
  B)
   \[\text{C}{{\text{r}}_{\text{2}}}\text{O}_{\text{7}}^{\text{2-}}\]
  done clear
  C)
   \[\text{CrO}_{4}^{\text{2-}}\]                   
  done clear
  D)
   \[\text{MnO}_{\text{4}}^{\text{2-}}\]
  done clear
  View Answer play_arrow

• question_answer71) Iron carbonyl, \[\text{Fe(CO}{{\text{)}}_{\text{5}}}\] is [NEET - 2018]
  A)
   Trinuclear                  
  done clear
  B)
   Mononuclear
  done clear
  C)
   Tetranuclear  
  done clear
  D)
   Dinuclear
  done clear
  View Answer play_arrow

• question_answer72) The type of isomerism shown by the complex \[\text{ }\!\![\!\!\text{ CoC}{{\text{l}}_{\text{2}}}{{\text{(en)}}_{\text{2}}}\text{ }\!\!]\!\!\text{ }\]is [NEET - 2018]
  A)
   Ionization isomerism
  done clear
  B)
   Coordination isomerism
  done clear
  C)
   Geometrical isomerism
  done clear
  D)
   Linkage isomerism
  done clear
  View Answer play_arrow

• question_answer73) The geometry and magnetic behaviour of the complex \[\text{ }\!\![\!\!\text{ Ni(CO}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }\] are [NEET - 2018]
  A)
   Square planar geometry and paramagnetic
  done clear
  B)
   Tetrahedral geometry and diamagnetic
  done clear
  C)
   Square planar geometry and diamagnetic
  done clear
  D)
   Tetrahedral geometry and paramagnetic
  done clear
  View Answer play_arrow

• question_answer74) Following solutions were prepared by mixing different volumes of NaOH and HCl of different concentrations :  [NEET - 2018]

  A. \[\text{60mL}\frac{\text{M}}{\text{10}}\text{HCl+40mL}\frac{\text{M}}{\text{10}}\text{NaOH}\]

  B. \[\text{55mL}\frac{\text{M}}{\text{10}}\text{HCl+45mL}\frac{\text{M}}{\text{10}}\text{NaOH}\]

  C. \[\text{75mL}\frac{\text{M}}{\text{5}}\text{HCl+25mL}\frac{\text{M}}{\text{5}}\text{NaOH}\]

  D. \[\text{100mL}\frac{\text{M}}{\text{10}}\text{HCl+100mL}\frac{\text{M}}{\text{10}}\text{NaOH}\]

  pH of which one of them will be equal to 1?
  A)
   D                               
  done clear
  B)
   A
  done clear
  C)
   B                                
  done clear
  D)
   C
  done clear
  View Answer play_arrow

• question_answer75) On which of the following properties does the coagulating power of an ion depend? [NEET - 2018]
  A)
   Both magnitude and sign of the charge on the ion
  done clear
  B)
   Size of the ion alone
  done clear
  C)
   The magnitude of the charge on the ion alone
  done clear
  D)
   The sign of charge on the ion alone
  done clear
  View Answer play_arrow

• question_answer76) Given van der Waals constant for \[\text{N}{{\text{H}}_{\text{3}}}\text{,}{{\text{H}}_{\text{2}}}\text{,}{{\text{O}}_{\text{2}}}\] and \[\text{C}{{\text{O}}_{2}}\] are respectively 4.17, 0.244, 1.36 and 3.59, which one of the following gases is most easily liquefied?                       [NEET - 2018]
  A)
   \[{{\text{O}}_{\text{2}}}\]                          
  done clear
  B)
   \[{{\text{H}}_{\text{2}}}\]
  done clear
  C)
   \[\text{N}{{\text{H}}_{3}}\]                       
  done clear
  D)
   \[\text{C}{{\text{O}}_{\text{2}}}\]
  done clear
  View Answer play_arrow

• question_answer77) The solubility of \[\text{BaS}{{\text{O}}_{\text{4}}}\] in water is \[\text{2}\text{.42 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--3}}}\text{g}{{\text{L}}^{\text{-1}}}\] at 298 K. The value of its solubility product\[\text{(}{{\text{K}}_{\text{sp}}}\text{)}\] will be  (Given molar mass of\[\text{BaS}{{\text{O}}_{\text{4}}}\text{=233 g mo}{{\text{l}}^{\text{--1}}}\])[NEET - 2018]
  A)
   \[\text{1}\text{.08 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--14}}}\text{ mol 2}{{\text{L}}^{\text{--2}}}\]
  done clear
  B)
   \[\text{1}\text{.08 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--12}}}\text{mo}{{\text{l}}^{\text{2}}}{{\text{L}}^{\text{--2}}}\]
  done clear
  C)
   \[\text{1}\text{.08 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--10}}}\text{mo}{{\text{l}}^{\text{2}}}{{\text{L}}^{\text{--2}}}\]
  done clear
  D)
   \[\text{1}\text{.08 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{--8}}}\text{mo}{{\text{l}}^{\text{2}}}{{\text{L}}^{\text{--2}}}\]
  done clear
  View Answer play_arrow

• question_answer78) In which case is number of molecules of water maximum?      [NEET - 2018]
  A)
   0.00224 L of water vapours at 1 atm and 273 K
  done clear
  B)
   0.18 g of water
  done clear
  C)
   18 mL of water
  done clear
  D)
   \[\text{1}{{\text{0}}^{\text{--3}}}\text{ mol}\]of water
  done clear
  View Answer play_arrow

• question_answer79) The correct difference between first and second order reactions is that                       [NEET - 2018]
  A)
   A first-order reaction can catalyzed; a second-order reaction cannot be catalyzed
  done clear
  B)
   The half-life of a first-order reaction does not depend on\[{{\text{ }\!\![\!\!\text{ A }\!\!]\!\!\text{ }}_{0}}\]; the half-life of a second-order reaction does depend on \[{{\text{ }\!\![\!\!\text{ A }\!\!]\!\!\text{ }}_{0}}\]
  done clear
  C)
   The rate of a first-order reaction does not depend on reactant concentrations; the rate of a second-order reaction does depend on reactant concentrations
  done clear
  D)
   The rate of a first-order reaction does depend on reactant concentrations; the rate of a second-order reaction does not depend on reactant concentrations.
  done clear
  View Answer play_arrow

• question_answer80) Among\[\text{Ca}{{\text{H}}_{\text{2}}}\], \[\text{Be}{{\text{H}}_{\text{2}}}\], \[\text{Ba}{{\text{H}}_{\text{2}}}\], the order of ionic character is [NEET - 2018]
  A)
   \[\text{Be}{{\text{H}}_{\text{2}}}\text{ Ba}{{\text{H}}_{\text{2}}}\text{ Ca}{{\text{H}}_{\text{2}}}\]
  done clear
  B)
   \[\text{Ca}{{\text{H}}_{\text{2}}}\text{ Be}{{\text{H}}_{\text{2}}}\text{ Ba}{{\text{H}}_{\text{2}}}\]
  done clear
  C)
   \[\text{Be}{{\text{H}}_{\text{2}}}\text{ Ca}{{\text{H}}_{\text{2}}}\text{ Ba}{{\text{H}}_{\text{2}}}\]
  done clear
  D)
   \[\text{Ba}{{\text{H}}_{\text{2}}}\text{ Be}{{\text{H}}_{\text{2}}}\text{ Ca}{{\text{H}}_{\text{2}}}\]
  done clear
  View Answer play_arrow

• question_answer81) Consider the change in oxidation state of Bromine corresponding to different emf values as shown in the diagram below:              [NEET - 2018]

  Then the species undergoing disproportionation is

  A)
   \[\text{B}{{\text{r}}_{2}}\]                         
  done clear
  B)
   \[\text{BrO}_{\text{4}}^{\text{-}}\]
  done clear
  C)
   \[\text{BrO}_{\text{3}}^{\text{-}}\]                      
  done clear
  D)
   \[\text{HBrO}\]
  done clear
  View Answer play_arrow

• question_answer82) For the redox reaction\[\text{MnO}_{4}^{-}+{{C}_{2}}O_{4}^{2-}+{{H}^{+}}\xrightarrow{{}}M{{n}^{2+}}+C{{O}_{2}}+{{H}_{2}}O\]. The correct coefficients of the reactants for the balanced equation are                 [NEET - 2018]
  A)

  \[\text{MnO}_{\text{4}}^{\text{-}}\]	\[{{\text{C}}_{\text{2}}}\text{O}_{\text{4}}^{\text{2-}}\]	\[{{\text{H}}^{+}}\]
  2	16	5

  done clear
  B)

  \[\text{MnO}_{\text{4}}^{\text{-}}\]	\[{{\text{C}}_{\text{2}}}\text{O}_{\text{4}}^{\text{2-}}\]	\[{{\text{H}}^{+}}\]
  2	5	16

  done clear
  C)

  \[\text{MnO}_{\text{4}}^{\text{-}}\]	\[{{\text{C}}_{\text{2}}}\text{O}_{\text{4}}^{\text{2-}}\]	\[{{\text{H}}^{+}}\]
  16	5	2

  done clear
  D)

  \[\text{MnO}_{\text{4}}^{\text{-}}\]	\[{{\text{C}}_{\text{2}}}\text{O}_{\text{4}}^{\text{2-}}\]	\[{{\text{H}}^{+}}\]
  5	16	2

  done clear
  View Answer play_arrow

• question_answer83) Which one of the following conditions will favour maximum formation of the product in the reaction, \[{{A}_{2}}(g)+{{B}_{2}}(g){{X}_{2}}(g){{\Delta }_{r}}H=-X\,\,kJ?\][NEET - 2018]
  A)
   High temperature and high pressure
  done clear
  B)
   Low temperature and low pressure
  done clear
  C)
   Low temperature and high pressure
  done clear
  D)
   High temperature and low pressure
  done clear
  View Answer play_arrow

• question_answer84) When initial concentration of the reactant is doubled, the half-life period of a zero order reaction [NEET - 2018]
  A)
   Is tripled         
  done clear
  B)
   Is doubled
  done clear
  C)
   Is halved                    
  done clear
  D)
   Remains unchanged
  done clear
  View Answer play_arrow

• question_answer85) The bond dissociation energies of \[{{\text{X}}_{\text{2}}}\text{,}{{\text{Y}}_{\text{2}}}\] and \[\text{XY}\] are in the ratio of 1 : 0.5 : 1. \[\Delta \text{H}\] for the formation of XY is \[\text{--200 kJ mo}{{\text{l}}^{\text{--1}}}\]. The bond dissociation energy of \[{{\text{X}}_{\text{2}}}\] will be             [NEET - 2018]
  A)
   \[\text{800 kJ mo}{{\text{l}}^{\text{--1}}}\]         
  done clear
  B)
   \[\text{100 kJ mo}{{\text{l}}^{\text{--1}}}\]
  done clear
  C)
   \[\text{200 kJ mo}{{\text{l}}^{\text{--1}}}\]         
  done clear
  D)
   \[\text{400 kJ mo}{{\text{l}}^{\text{--1}}}\]
  done clear
  View Answer play_arrow

• question_answer86) The correction factor 'a' to the ideal gas equation corresponds to [NEET - 2018]
  A)
   Electric field present between the gas molecules
  done clear
  B)
   Volume of the gas molecules
  done clear
  C)
   Density of the gas molecules
  done clear
  D)
   Forces of attraction between the gas molecules
  done clear
  View Answer play_arrow

• question_answer87) Consider the following species\[:\text{C}{{\text{N}}^{\text{+}}}\text{, C}{{\text{N}}^{\text{--}}}\text{, NO and CN}\]. Which one of these will have the highest bond order?            [NEET - 2018]
  A)
   \[\text{C}{{\text{N}}^{\text{+}}}\]                      
  done clear
  B)
   \[\text{C}{{\text{N}}^{\text{--}}}\]
  done clear
  C)
   NO                            
  done clear
  D)
   CN
  done clear
  View Answer play_arrow

• question_answer88) Magnesium reacts with an element (X) to form an ionic compound. If the ground state electronic configuration of (X) is\[1{{s}^{2}}\text{ }2{{s}^{2}}\text{ }2{{p}^{3}}\], the simplest formula for this compound is [NEET - 2018]
  A)
   \[\text{M}{{\text{g}}_{\text{2}}}\text{X}\]            
  done clear
  B)
   \[\text{Mg}{{\text{X}}_{2}}\]
  done clear
  C)
   \[\text{M}{{\text{g}}_{2}}{{\text{X}}_{3}}\]                   
  done clear
  D)
   \[\text{M}{{\text{g}}_{3}}{{\text{X}}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer89) Iron exhibits bcc structure at room temperature. Above\[\text{900 }\!\!{}^\circ\!\!\text{ C}\], it transforms to fcc structure. The ratio of density of iron at room temperature to that at \[\text{900 }\!\!{}^\circ\!\!\text{ C}\](assuming molar mass and atomic radii of iron remains constant with temperature) is [NEET - 2018]
  A)
   \[\frac{3\sqrt{3}}{4\sqrt{2}}\]                     
  done clear
  B)
   \[\frac{4\sqrt{3}}{3\sqrt{2}}\]
  done clear
  C)
   \[\frac{\sqrt{3}}{\sqrt{2}}\]                         
  done clear
  D)
   \[\frac{1}{2}\]
  done clear
  View Answer play_arrow

• question_answer90) Which one is a wrong statement?                    [NEET - 2018]
  A)
   The electronic configuration of N atom is
  done clear
  B)
   An orbital is designated by three quantum numbers while an electron in an atom is designated by four quantum numbers
  done clear
  C)
   Total orbital angular momentum of electron in 's' orbital is equal to zero
  done clear
  D)
   The value of m for \[{{\text{d}}_{\text{z}}}\text{2}\] is zero
  done clear
  View Answer play_arrow

• question_answer91) Oxygen is not produced during photosynthesis by       [NEET - 2018]
  A)
   Cycas
  done clear
  B)
   Nostoc
  done clear
  C)
   Green sulphur bacteria
  done clear
  D)
   Chara
  done clear
  View Answer play_arrow

• question_answer92) Double fertilization is   [NEET - 2018]
  A)
   Fusion of two male gametes with one egg
  done clear
  B)
   Fusion of one male gamete with two polar nuclei
  done clear
  C)
   Fusion of two male gametes of a pollen tube with two different eggs
  done clear
  D)
   Syngamy and triple fusion
  done clear
  View Answer play_arrow

• question_answer93) Which one of the following plants shows a very close relationship with a species of moth, where none of the two can complete its life cycle without the other?  [NEET - 2018]
  A)
   Banana                      
  done clear
  B)
   Yucca
  done clear
  C)
   Hydrilla                      
  done clear
  D)
   Viola
  done clear
  View Answer play_arrow

• question_answer94) Pollen grains can be stored for several years in liquid nitrogen having a temperature of [NEET - 2018]
  A)
   \[\text{--196 }\!\!{}^\circ\!\!\text{ C}\]                     
  done clear
  B)
   \[\text{--80 }\!\!{}^\circ\!\!\text{ C}\]
  done clear
  C)
   \[\text{--120 }\!\!{}^\circ\!\!\text{ C}\]                     
  done clear
  D)
   \[\text{--160 }\!\!{}^\circ\!\!\text{ C}\]
  done clear
  View Answer play_arrow

• question_answer95) Which of the following elements is responsible for maintaining turgor in cells? [NEET - 2018]
  A)
   Potassium                  
  done clear
  B)
   Sodium
  done clear
  C)
   Magnesium                
  done clear
  D)
   Calcium
  done clear
  View Answer play_arrow

• question_answer96) What is the role of \[\text{NA}{{\text{D}}^{\text{+}}}\]in cellular respiration?                 [NEET - 2018]
  A)
   It is a nucleotide source for ATP synthesis.
  done clear
  B)
   It functions as an electron carrier.
  done clear
  C)
   It functions as an enzyme.
  done clear
  D)
   It is the final electron acceptor for anaerobic respiration.
  done clear
  View Answer play_arrow

• question_answer97) In which of the following forms is iron absorbed by plants?     [NEET - 2018]
  A)
   Free element  
  done clear
  B)
   Ferrous
  done clear
  C)
   Ferric             
  done clear
  D)
   Both ferric and ferrous
  done clear
  View Answer play_arrow

• question_answer98) Which of the following is commonly used as a vector for introducing a DNA fragment in human lymphocytes?            [NEET - 2018]
  A)
   \[\lambda \] phage                 
  done clear
  B)
   \[\text{Ti}\] plasmid
  done clear
  C)
   Retrovirus                  
  done clear
  D)
   \[\text{pBR 322}\]
  done clear
  View Answer play_arrow

• question_answer99) Use of bioresources by multinational companies and organisations without authorisation from the concerned country and its people is called  [NEET - 2018]
  A)
   Biodegradation          
  done clear
  B)
   Biopiracy
  done clear
  C)
   Bio-infringement        
  done clear
  D)
   Bioexploitation
  done clear
  View Answer play_arrow

• question_answer100) In India, the organisation responsible for assessing the safety of introducing genetically modified organisms for public use is                             [NEET - 2018]
  A)
   Research Committee on Genetic Manipulation (RCGM)
  done clear
  B)
   Council for Scientific and Industrial Research (CSIR)
  done clear
  C)
   Indian Council of Medical Research (ICMR)
  done clear
  D)
   Genetic Engineering Appraisal Committee (GEAC)
  done clear
  View Answer play_arrow

• question_answer101) The correct order of steps in Polymerase Chain Reaction (PCR) is [NEET - 2018]
  A)
   Denaturation, Extension, Annealing
  done clear
  B)
   Annealing, Extension, Denaturation
  done clear
  C)
   Extension, Denaturation, Annealing
  done clear
  D)
   Denaturation, Annealing, Extension
  done clear
  View Answer play_arrow

• question_answer102) Select the correct match   [NEET - 2018]
  A)
   T.H. Morgan        -Transduction
  done clear
  B)
   \[{{\text{F}}_{\text{2}}}\text{ }\!\!\times\!\!\text{  Recessive parent}\] - Dihybrid cross
  done clear
  C)
   Ribozyme                         - Nucleic acid
  done clear
  D)
   G. Mendel                        - Transformation
  done clear
  View Answer play_arrow

• question_answer103) A 'new' variety of rice was patented by a foreign company, though such varieties have been present in India for a long time. This is related to                  [NEET - 2018]
  A)
   Lerma Rojo               
  done clear
  B)
   Sharbati Sonora
  done clear
  C)
   Co-667                      
  done clear
  D)
   Basmati
  done clear
  View Answer play_arrow

• question_answer104) Which of the following pairs is wrongly matched?                   [NEET - 2018]
  A)

  XO type sex determination

  Grasshopper

  done clear
  B)

  ABO blood grouping

  Co-dominance

  done clear
  C)

  Starch synthesis in pea

  Multiple alleles

  done clear
  D)

  T.H. Morgan

  Linkage

  done clear
  View Answer play_arrow

• question_answer105) Select the correct statement [NEET - 2018]
  A)
   Spliceosomes take part in translation
  done clear
  B)
   Punnett square was developed by a British scientist
  done clear
  C)
   Franklin Stahl coined the term ??linkage??
  done clear
  D)
   Transduction was discovered by S. Altman
  done clear
  View Answer play_arrow

• question_answer106) The experimental proof for semiconservative replication of DNA was first shown in a            [NEET - 2018]
  A)
   Plant              
  done clear
  B)
   Bacterium
  done clear
  C)
   Fungus                       
  done clear
  D)
   Virus
  done clear
  View Answer play_arrow

• question_answer107) Which of the following flowers only once in its life-time?                     [NEET - 2018]
  A)
   Mango           
  done clear
  B)
   Jackfruit
  done clear
  C)
   Bamboo species        
  done clear
  D)
   Papaya
  done clear
  View Answer play_arrow

• question_answer108) Offsets are produced by [NEET - 2018]
  A)
   Parthenocarpy           
  done clear
  B)
   Mitotic divisions
  done clear
  C)
   Meiotic divisions        
  done clear
  D)
   Parthenogenesis
  done clear
  View Answer play_arrow

• question_answer109) Select the correct match [NEET - 2018]
  A)

  Matthew Meseison and F.Stahl

  Pisum sativum

  done clear
  B)

  Alfred Hershey and Martha Chase

  TMV

  done clear
  C)

  Alec Jeffreys

  Streptococcus pneumoniae

  done clear
  D)

  Francois Jacob and Jacques Monod

  Lac operon

  done clear
  View Answer play_arrow

• question_answer110) Which of the following has proved helpful in preserving pollen as fossils? [NEET - 2018]
  A)
   Oil content                 
  done clear
  B)
   Cellulosic intine
  done clear
  C)
   Pollenkitt                    
  done clear
  D)
   Sporopollenin
  done clear
  View Answer play_arrow

• question_answer111) Natality refers to          [NEET - 2018]
  A)
   Number of individuals leaving the habitat
  done clear
  B)
   Birth rate
  done clear
  C)
   Death rate
  done clear
  D)
   Number of individuals entering a habitat
  done clear
  View Answer play_arrow

• question_answer112) World Ozone Day is celebrated on                              [NEET - 2018]
  A)
   16th September         
  done clear
  B)
   21st April
  done clear
  C)
   5th June                     
  done clear
  D)
   22nd April
  done clear
  View Answer play_arrow

• question_answer113) Which of the following is a secondary pollutant?         [NEET - 2018]
  A)
   \[\text{S}{{\text{O}}_{2}}\]           
  done clear
  B)
   \[\text{C}{{\text{O}}_{\text{2}}}\]
  done clear
  C)
   \[\text{CO}\]                         
  done clear
  D)
   \[{{\text{O}}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer114) Niche is           [NEET - 2018]
  A)
   the range of temperature that the organism needs to live
  done clear
  B)
   the physical space where an organism lives
  done clear
  C)
   all the biological factors in the organism's environment
  done clear
  D)
   the functional role played by the organism where it lives
  done clear
  View Answer play_arrow

• question_answer115) What type of ecological pyramid would be obtained with the following data?             [NEET - 2018]

  Secondary consumer : 120 g

  Primary consumer : 60 g

  Primary producer : 10 g

  A)
   Upright pyramid of numbers
  done clear
  B)
   Pyramid of energy
  done clear
  C)
   Inverted pyramid of biomass
  done clear
  D)
   Upright pyramid of biomass
  done clear
  View Answer play_arrow

• question_answer116) In stratosphere, which of the following elements acts as a catalyst in degradation of ozone and release of molecular oxygen?                                   [NEET - 2018]
  A)
   Fe                              
  done clear
  B)
   Cl
  done clear
  C)
   Carbon                      
  done clear
  D)
   Oxygen
  done clear
  View Answer play_arrow

• question_answer117) The two functional groups characteristic of sugars are            [NEET - 2018]
  A)
   Carbonyl and phosphate
  done clear
  B)
   Carbonyl and methyl
  done clear
  C)
   Hydroxyl and methyl
  done clear
  D)
   Carbonyl and hydroxyl
  done clear
  View Answer play_arrow

• question_answer118) Which among the following is not a prokaryote?                     [NEET - 2018]
  A)
   Nostoc                       
  done clear
  B)
   Mycobacterium
  done clear
  C)
   Saccharomyces         
  done clear
  D)
   Oscillatoria
  done clear
  View Answer play_arrow

• question_answer119) The Golgi complex participates in                               [NEET - 2018]
  A)
   Respiration in bacteria
  done clear
  B)
   Formation of secretory vesicles
  done clear
  C)
   Fatty acid breakdown
  done clear
  D)
   Activation of amino acid
  done clear
  View Answer play_arrow

• question_answer120) Which of the following is not a product of light reaction of photosynthesis?                 [NEET - 2018]
  A)
   NADPH                     
  done clear
  B)
   NADH
  done clear
  C)
   ATP                           
  done clear
  D)
   Oxygen
  done clear
  View Answer play_arrow

• question_answer121) Which of the following is true for nucleolus?                            [NEET - 2018]
  A)
   It takes part in spindle formation
  done clear
  B)
   It is a membrane-bound structure
  done clear
  C)
   Larger nucleoli are present in dividing cells
  done clear
  D)
   It is a site for active ribosomal RNA synthesis
  done clear
  View Answer play_arrow

• question_answer122) Stomatal movement is not affected by                         [NEET - 2018]
  A)
   \[{{\text{O}}_{\text{2}}}\] concentration
  done clear
  B)
   Light
  done clear
  C)
   Temperature
  done clear
  D)
   \[\text{C}{{\text{O}}_{\text{2}}}\]concentration
  done clear
  View Answer play_arrow

• question_answer123) The stage during which separation of the paired homologous chromosomes begins is [NEET - 2018]
  A)
   Diakinesis                  
  done clear
  B)
   Diplotene
  done clear
  C)
   Pachytene                  
  done clear
  D)
   Zygotene
  done clear
  View Answer play_arrow

• question_answer124) Stomata in grass leaf are                                 [NEET - 2018]
  A)
   Rectangular               
  done clear
  B)
   Kidney shaped
  done clear
  C)
   Dumb-bell shaped      
  done clear
  D)
   Barrel shaped
  done clear
  View Answer play_arrow

• question_answer125) Secondary xylem and phloem in dicot stem are produced by  [NEET - 2018]
  A)
   Phellogen
  done clear
  B)
   Vascular cambium
  done clear
  C)
   Apical meristems
  done clear
  D)
   Axillary meristems
  done clear
  View Answer play_arrow

• question_answer126) Pneumatophores occur in [NEET - 2018]
  A)
   Carnivorous plants
  done clear
  B)
   Free-floating hydrophytes
  done clear
  C)
   Halophytes
  done clear
  D)
   Submerged hydrophytes
  done clear
  View Answer play_arrow

• question_answer127) Casparian strips occur in [NEET - 2018]
  A)
   Cortex            
  done clear
  B)
   Pericycle
  done clear
  C)
   Epidermis                  
  done clear
  D)
   Endodermis
  done clear
  View Answer play_arrow

• question_answer128) Plants having little or no secondary growth are                                       [NEET - 2018]
  A)
   Conifers
  done clear
  B)
   Deciduous angiosperms
  done clear
  C)
   Grasses
  done clear
  D)
   Cycads
  done clear
  View Answer play_arrow

• question_answer129) Sweet potato is a modified  [NEET - 2018]
  A)
   Tap root                     
  done clear
  B)
   Adventitious root
  done clear
  C)
   Stem              
  done clear
  D)
   Rhizome
  done clear
  View Answer play_arrow

• question_answer130) Which of the following statements is correct?                           [NEET - 2018]
  A)
   Horsetails are gymnosperms
  done clear
  B)
   Selaginella is heterosporous, while Salvinia is homosporous
  done clear
  C)
   Ovules are not enclosed by ovary wall in gymnosperms
  done clear
  D)
   Stems are usually unbranched in both Cycas and Cedrus
  done clear
  View Answer play_arrow

• question_answer131) Select the wrong statement:                             [NEET - 2018]
  A)
   Pseudopodia are locomotory and feeding structures in Sporozoans
  done clear
  B)
   Mushrooms belong to Basidiomycetes
  done clear
  C)
   Cell wall is present in members of Fungi and Plantae
  done clear
  D)
   Mitochondria are the powerhouse of the cell in all kingdoms except Monera
  done clear
  View Answer play_arrow

• question_answer132) After karyogamy followed by meiosis, spores are produced exogenously in                 [NEET - 2018]
  A)
   Agaricus                    
  done clear
  B)
   Alternaria
  done clear
  C)
   Neurospora                
  done clear
  D)
   Saccharomyces
  done clear
  View Answer play_arrow

• question_answer133) Match the items given in Column I with those in Column II and select the correct option given below:                        [NEET - 2018]

  Column I	Column II
  A. Herbarium	(i) It is a place having a collection of preserved plants and animals
  B. key	(ii) A list that enumerates methodically all the species found in an area with brief description aiding identification
  C. Museum	(iii) is a place where dried and pressed plant specimens mounted on sheets are kept
  D. Catalogue	(iv) A booklet containing a list of characters and their alternates which are helpful in identification of various taxa.

  A)
              A-(ii)    B-(iv)   C-(iii)   D-(i)
  done clear
  B)
              A- (iii)  B- (ii)   C- (i)    D- (iv)
  done clear
  C)
              A- (i)    B- (iv)  C- (iii)  D- (ii)
  done clear
  D)
              A- (iii)  B- (iv)  C- (i)    D- (ii)
  done clear
  View Answer play_arrow

• question_answer134) Winged pollen grains are present in                             [NEET - 2018]
  A)
   Mango           
  done clear
  B)
   Cycas
  done clear
  C)
   Mustard                     
  done clear
  D)
   Pinus
  done clear
  View Answer play_arrow

• question_answer135) Which one is wrongly matched?                                  [NEET - 2018]
  A)
   Gemma cups      - Marchantia
  done clear
  B)
   Biflagellate zoospores - Brown algae
  done clear
  C)
   Uniflagellate gametes - Polysiphonia
  done clear
  D)
   Unicellular organism   - Chlorella
  done clear
  View Answer play_arrow

• question_answer136) Which of the following options correctly represents the lung conditions in asthma and emphysema, respectively?                                     [NEET - 2018]
  A)
   Increased respiratory surface; Inflammation of bronchioles
  done clear
  B)
   Increased number of bronchioles; Increased respiratory surface
  done clear
  C)
   Inflammation of bronchioles; Decreased respiratory surface
  done clear
  D)
   Decreased respiratory surface; Inflammation of bronchioles
  done clear
  View Answer play_arrow

• question_answer137) Match the items given in Column I with those in Column II and select the correct option given below :                       [NEET - 2018]

  Column I	Column II
  a. Tricuspid valve	i. Between left atrium and left ventricle
  b. Bicuspid valve	ii. Between right ventricle and pulmonary artery
  c. Semilunar valve	iii. Between right atrium and right ventricle

  A)
              a-i        b-ii       c-iii
  done clear
  B)
              a-i        b-iii      c-ii
  done clear
  C)
              a-iii      b-i        c-ii
  done clear
  D)
              a-ii       b-i        c-iii
  done clear
  View Answer play_arrow

• question_answer138) Match the items given in Column I with those in Column II and select the correct option given below:                        [NEET - 2018]

  Column - I	Column - II
  a. Tidal volume	i. 2500-3000 mL
  b. Inspiratory Reserve volume	ii. 1100-1200 mL
  c. Expiratory Reserve volume	iii. 500-550 mL
  d. Residual volume	iv. 1000-1100 mL

  A)
              a-i        b-iv      c-ii       d-iii
  done clear
  B)
              a-iii      b-i        c-iv      d-ii
  done clear
  C)
              a-iii      b-ii       c-i        d-iv
  done clear
  D)
              a-iv      b-iii      c-ii       d-i
  done clear
  View Answer play_arrow

• question_answer139) The transparent lens in the human eye is held in its place by               [NEET - 2018]
  A)
   smooth muscles attached to the iris
  done clear
  B)
   ligaments attached to the iris
  done clear
  C)
   ligaments attached to the ciliary body
  done clear
  D)
   smooth muscles attached to the ciliary body
  done clear
  View Answer play_arrow

• question_answer140) Which of the following is an amino acid derived hormone?     [NEET - 2018]
  A)
   Estradiol                    
  done clear
  B)
   Ecdysone
  done clear
  C)
   Epinephrine   
  done clear
  D)
   Estriol
  done clear
  View Answer play_arrow

• question_answer141) Which of the following hormones can play a significant role in osteoporosis?             [NEET - 2018]
  A)
   Estrogen and Parathyroid hormone
  done clear
  B)
   Progesterone and Aldosterone
  done clear
  C)
   Aldosterone and Prolactin
  done clear
  D)
   Parathyroid hormone and Prolactin
  done clear
  View Answer play_arrow

• question_answer142) Which of the following structures or regions is incorrectly paired with its functions?    [NEET - 2018]
  A)
   Hypothalamus: production of releasing hormones and regulation of temperature, hunger and thirst.
  done clear
  B)
   Limbic system: consists of fibre tracts that interconnect different regions of brain; controls movement.
  done clear
  C)
   Medulla oblongata: controls respiration and cardiovascular reflexes.
  done clear
  D)
   Corpus callosum: band of fibers connecting left and right cerebral hemispheres.
  done clear
  View Answer play_arrow

• question_answer143) The amnion of mammalian embryo is derived from                [NEET - 2018]
  A)
   mesoderm and trophoblast
  done clear
  B)
   endoderm and mesoderm
  done clear
  C)
   ectoderm and mesoderm
  done clear
  D)
   ectoderm and endoderm
  done clear
  View Answer play_arrow

• question_answer144) Hormones secreted by the placenta tomaintain pregnancy are [NEET - 2018]
  A)
   hCG, hPL, progestogens, estrogens
  done clear
  B)
   hCG, hPL, estrogens, relaxin, oxytocin
  done clear
  C)
   hCG, hPL, progestogens, prolactin
  done clear
  D)
   hCG, progestogens, estrogens, glucocorticoids
  done clear
  View Answer play_arrow

• question_answer145) The difference between spermiogenesis and spermiation is                 [NEET - 2018]
  A)
   In spermiogenesis spermatozoa from sertoli cells are released into the cavity of seminiferous tubules,  while in spermiation spermatozoa are formed.
  done clear
  B)
   In spermiogenesis spermatozoa are formed, while in spermiation spermatids are formed.
  done clear
  C)
   In spermiogenesis spermatids are formed, while in spermiation spermatozoa are formed.
  done clear
  D)
   In spermiogenesis spermatozoa are formed, while in spermiation spermatozoa are released from sertoli cells into the cavity of seminiferous tubules.
  done clear
  View Answer play_arrow

• question_answer146) The contraceptive 'SAHELI' [NEET - 2018]
  A)
   is an IUD.
  done clear
  B)
   increases the concentration of estrogen and prevents ovulation in females.
  done clear
  C)
   blocks estrogen receptors in the uterus, preventing eggs from getting implanted.
  done clear
  D)
   is a post-coital contraceptive.
  done clear
  View Answer play_arrow

• question_answer147) Ciliates differ from all other protozoans in                               [NEET - 2018]
  A)
   using pseudopodia for capturing prey
  done clear
  B)
   having a contractile vacuole for removing excess water
  done clear
  C)
   using flagella for locomotion
  done clear
  D)
   having two types of nuclei
  done clear
  View Answer play_arrow

• question_answer148) Identify the vertebrate group of animals characterized by crop and gizzard in its digestive system       [NEET - 2018]
  A)
   Aves               
  done clear
  B)
   Reptilia
  done clear
  C)
   Amphibia                   
  done clear
  D)
   Osteichthyes
  done clear
  View Answer play_arrow

• question_answer149) Which of the following features is used to identify a male cockroach from a female cockroach?         [NEET - 2018]
  A)
   Forewings with darker tegmina
  done clear
  B)
   Presence of caudal styles
  done clear
  C)
   Presence of a boat shaped sternum on the 9th abdominal segment
  done clear
  D)
   Presence of anal cerci
  done clear
  View Answer play_arrow

• question_answer150) Which one of these animals is not a homeotherm?                  [NEET - 2018]
  A)
   Camelus                    
  done clear
  B)
   Chelone
  done clear
  C)
   Macropus                   
  done clear
  D)
   Psittacula
  done clear
  View Answer play_arrow

• question_answer151) Which of the following animals does not undergo metamorphosis? [NEET - 2018]
  A)
   Moth              
  done clear
  B)
   Tunicate
  done clear
  C)
   Earthworm                 
  done clear
  D)
   Starfish
  done clear
  View Answer play_arrow

• question_answer152) Which of the following organisms are known as chief producers in the oceans?          [NEET - 2018]
  A)
   Cyanobacteria           
  done clear
  B)
   Diatoms
  done clear
  C)
   Dinoflagellates
  done clear
  D)
   Euglenoids
  done clear
  View Answer play_arrow

• question_answer153) Which one of the following population interactions is widely used in medical science for the production of antibiotics?                              [NEET - 2018]
  A)
   Parasitism                  
  done clear
  B)
   Mutualism
  done clear
  C)
   Commensalism          
  done clear
  D)
   Amensalism
  done clear
  View Answer play_arrow

• question_answer154) All of the following are included in 'ex-situ conservation' except          [NEET - 2018]
  A)
   Botanical gardens      
  done clear
  B)
   Sacred groves
  done clear
  C)
   Wildlife safari parks   
  done clear
  D)
   Seed banks
  done clear
  View Answer play_arrow

• question_answer155) Match the items given in Column I with those in Column II and select the correct option given below :                       [NEET - 2018]

  Column - I	Column - II
  a. Eutrophication	i. UV-B radiation
  b. Sanitary landfill	ii. Deforestation
  c. Snow blindness	iii. Nutrient enrichment
  d. Jhum cultivation	iv. Waste disposal

  A)
              a-iii      b-iv      c-i        d-ii
  done clear
  B)
              a-i        b-iii      c-iv      d-ii
  done clear
  C)
              a-ii       b-i        c-iii      d-iv
  done clear
  D)
              a-i        b-ii       c-iv      d-iii
  done clear
  View Answer play_arrow

• question_answer156) In a growing population of a country,                          [NEET - 2018]
  A)
   reproductive and pre-reproductive individuals are equal in number.
  done clear
  B)
   reproductive individuals are less than the post-reproductive individuals.
  done clear
  C)
   pre-reproductive individuals are more than the reproductive individuals.
  done clear
  D)
   pre-reproductive individuals are less than the reproductive individuals.
  done clear
  View Answer play_arrow

• question_answer157) Which part of poppy plant is used to obtain the drug ?Smack??          [NEET - 2018]
  A)
   Roots             
  done clear
  B)
   Latex
  done clear
  C)
   Flowers                      
  done clear
  D)
   Leaves
  done clear
  View Answer play_arrow

• question_answer158) All of the following are part of an operon except                                  [NEET - 2018]
  A)
   an enhancer   
  done clear
  B)
   structural genes
  done clear
  C)
   an operator                
  done clear
  D)
   a promoter
  done clear
  View Answer play_arrow

• question_answer159) A woman has an X-linked condition on one of her X chromosomes. This chromosome can be inherited by            [NEET - 2018]
  A)
   Only grandchildren
  done clear
  B)
   Only sons
  done clear
  C)
   Only daughters
  done clear
  D)
   Both sons and daughters
  done clear
  View Answer play_arrow

• question_answer160) According to Hugo de Vries, the mechanism of evolution is    [NEET - 2018]
  A)
   Phenotypic variations
  done clear
  B)
   Saltation
  done clear
  C)
   Multiple step mutations
  done clear
  D)
   Minor mutations
  done clear
  View Answer play_arrow

• question_answer161) AGGTATCGCAT is a sequence from the coding strand of a gene. What will be the corresponding sequence of the transcribed mRNA?                 [NEET - 2018]
  A)
   ACCUAUGCGAU
  done clear
  B)
   UGGTUTCGCAT
  done clear
  C)
   AGGUAUCGCAU
  done clear
  D)
   UCCAUAGCGUA
  done clear
  View Answer play_arrow

• question_answer162) Match the items given in Column I with those in Column II and select the correct option given below:                        [NEET - 2018]

  Column I	Column II
  a. Proliferative Phase	i. Breakdown of endometrial lining
  b. Secretory Phase	ii. Follicular Phase
  c. Menstruation	iii. Luteal Phase

  A)
              a-ii       b-iii      c-i
  done clear
  B)
              a-i        b-iii      c-ii
  done clear
  C)
              a-iii      b-ii       c-i
  done clear
  D)
              a-iii      b-i        c-ii
  done clear
  View Answer play_arrow

• question_answer163) Match the items given in Column I with those in Column II and select the correct option given below:                        [NEET - 2018]

  Column I	Column II
  a. Glycosuria	i. Accumulation of uric acid in joints
  b. Gout	ii. Mass of crystallised salts within the kidney
  c. Renal calculi	iii. Inflammation in glomeruli
  d. Glomerular nephritis	iv. Presence of glucose in urine

  A)
              a-ii       b-iii      c-i        d-iv
  done clear
  B)
              a-i        b-ii       c-iii      d-iv
  done clear
  C)
              a-iii      b-ii       c-iv      d-i
  done clear
  D)
              a-iv      b-i        c-ii       d-iii
  done clear
  View Answer play_arrow

• question_answer164) Match the items given in Column I with those in Column II and select the correct option given below:                        [NEET - 2018]

  Column I (Function)	Column II (Part of Excretory system)
  a. Ultrafiltration	i. Henle?s loop
  b. Concentration of urine	ii. Ureter
  c. Transport of urine	iii. Urinary bladder
  d. Storage of urine	iv. Malpighian corpuscle
  	v. Proximal convoluted tubule

  A)
              a-v       b-iv      c-i        d-ii
  done clear
  B)
              a-iv      b-i        c-ii       d-iii
  done clear
  C)
              a-iv      b-v       c-ii       d-iii
  done clear
  D)
              a-v       b-iv      c-i        d-iii
  done clear
  View Answer play_arrow

• question_answer165) Which of the following gastric cells indirectly help in erythropoiesis? [NEET - 2018]
  A)
   Goblet cells                
  done clear
  B)
   Mucous cells
  done clear
  C)
   Chief cells                  
  done clear
  D)
   Parietal cells
  done clear
  View Answer play_arrow

• question_answer166) Match the items given in Column I with those in Column II and select the correct option given below :                       [NEET - 2018]

  Column I	Column II
  a. Fibrinogen	(i) Osmotic balance
  b. Globulin	(ii) Blood clotting
  c. Albumin	(iii) Defence mechanism

  A)
              a-(i)     b-(iii)   c-(ii)
  done clear
  B)
              a- (i)    b-(ii)    c-(iii)
  done clear
  C)
              a- (iii)  b-(ii)    c-(i)
  done clear
  D)
              a- (ii)   b-(iii)   c-(i)
  done clear
  View Answer play_arrow

• question_answer167) Which of the following is an occupational respiratory disorder?          [NEET - 2018]
  A)
   Botulism        
  done clear
  B)
   Silicosis
  done clear
  C)
   Anthracis       
  done clear
  D)
   Emphysema
  done clear
  View Answer play_arrow

• question_answer168) Calcium is important in skeletal muscle contraction because it            [NEET - 2018]
  A)
   Detaches the myosin head from the actin filament.
  done clear
  B)
   Activates the myosin ATPase by binding to it.
  done clear
  C)
   Binds to troponin to remove the masking of active sites on actin for myosin.
  done clear
  D)
   Prevents the formation of bonds between the myosin cross bridges and the actin filament.
  done clear
  View Answer play_arrow

• question_answer169) Nissl bodies are mainly composed of                           [NEET - 2018]
  A)
   Nucleic acids and SER
  done clear
  B)
   DNA and RNA
  done clear
  C)
   Proteins and lipids
  done clear
  D)
   Free ribosomes and RER
  done clear
  View Answer play_arrow

• question_answer170) Which of these statements is incorrect?                                   [NEET - 2018]
  A)
   Glycolysis operates as long as it is supplied with NAD that can pick up hydrogen atoms
  done clear
  B)
   Glycolysis occurs in cytosol
  done clear
  C)
   Enzymes of TCA cycle are present in mitochondrial matrix
  done clear
  D)
   Oxidative phosphorylation takes place in outer mitochondrial membrane
  done clear
  View Answer play_arrow

• question_answer171) Select the incorrect match : [NEET - 2018]
  A)

  Submetacentric chromosomes

  L-shaped chromosomes

  done clear
  B)

  Allosomes

  Sex chromosomes

  done clear
  C)

  Lampbrush chromosomes

  Diplotene bivalents

  done clear
  D)

  Polytene chromosomes

  Oocytes of amphibians

  done clear
  View Answer play_arrow

• question_answer172) Which of the following terms describe human dentition?         [NEET - 2018]
  A)
   Pleurodont, Monophyodont, Homodont
  done clear
  B)
   Thecodont, Diphyodont, Heterodont
  done clear
  C)
   Thecodont, Diphyodont, Homodont
  done clear
  D)
   Pleurodont, Diphyodont, Heterodont
  done clear
  View Answer play_arrow

• question_answer173) Which of the following events does not occur in rough endoplasmic reticulum?          [NEET - 2018]
  A)
   Cleavage of signal peptide
  done clear
  B)
   Protein glycosylation
  done clear
  C)
   Protein folding
  done clear
  D)
   Phospholipid synthesis
  done clear
  View Answer play_arrow

• question_answer174) Many ribosomes may associate with a single mRNA to form multiple copies of a polypeptide simultaneously. Such strings of ribosomes are termed as [NEET - 2018]
  A)
   Plastidome                 
  done clear
  B)
   Polyhedral bodies
  done clear
  C)
   Polysome                   
  done clear
  D)
   Nucleosome
  done clear
  View Answer play_arrow

• question_answer175) In which disease does mosquito transmitted pathogen cause chronic inflammation of lymphatic vessels? [NEET - 2018]
  A)
   Ringworm disease     
  done clear
  B)
   Ascariasis
  done clear
  C)
   Elephantiasis 
  done clear
  D)
   Amoebiasis
  done clear
  View Answer play_arrow

• question_answer176) Which of the following is not an autoimmune disease?                        [NEET - 2018]
  A)
   Alzheimer's disease    
  done clear
  B)
   Rheumatoid arthritis
  done clear
  C)
   Psoriasis
  done clear
  D)
   Vitiligo
  done clear
  View Answer play_arrow

• question_answer177) Among the following sets of examples for divergent evolution, select the incorrect option:                   [NEET - 2018]
  A)
   Brain of bat, man and cheetah
  done clear
  B)
   Heart of bat, man and cheetah
  done clear
  C)
   Forelimbs of man, bat and cheetah
  done clear
  D)
   Eye of octopus, bat and man
  done clear
  View Answer play_arrow

• question_answer178) Conversion of milk to curd improves its nutritional value by increasing the amount of [NEET - 2018]
  A)
   Vitamin \[{{\text{B}}_{\text{12}}}\]           
  done clear
  B)
   Vitamin A
  done clear
  C)
   Vitamin D                  
  done clear
  D)
   Vitamin E
  done clear
  View Answer play_arrow

• question_answer179) The similarity of bone structure in the forelimbs of many vertebrates is an example of [NEET - 2018]
  A)
   Convergent evolution
  done clear
  B)
   Analogy
  done clear
  C)
   Homology
  done clear
  D)
   Adaptive radiation
  done clear
  View Answer play_arrow

• question_answer180) Which of the following characteristics represent ?Inheritance of blood groups? in humans? [NEET - 2018]

  a. Dominance

  b. Co-dominance

  c. Multiple allele

  d. Incomplete dominance

  e. Polygenic inheritance

  A)
   b, d and e                  
  done clear
  B)
   a, b and c
  done clear
  C)
   b, c and e                   
  done clear
  D)
   a, c and e
  done clear
  View Answer play_arrow