Solved papers for JCECE Medical JCECE Medical Solved Paper-2009

done JCECE Medical Solved Paper-2009 Total Questions - 150

• question_answer1) The twinkling effect of star light is due to
  A)
   total internal reflection
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  B)
   high dense matter of star
  done clear
  C)
   constant burning of hydrogen in the star
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  D)
   the fluctuating apparent position of the star being slightly different from the actual position of the star
  done clear
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• question_answer2) The width of the diffraction band varies
  A)
   inversely as the wavelength
  done clear
  B)
   directly as the width of the slit
  done clear
  C)
   directly as the distance between the slit and the screen
  done clear
  D)
   inversely as the size of the source from which the slit is illuminated
  done clear
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• question_answer3) An unpolarised beam of intensity \[{{\text{I}}_{\text{o}}}\]is incident on a pair of nicols making an angle of \[{{60}^{o}}\] with each other. The intensity of light emerging from the pair is
  A)
   \[{{I}_{o}}\]
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  B)
   \[\frac{{{I}_{o}}}{2}\]
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  C)
   \[\frac{{{I}_{o}}}{4}\]
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  D)
   \[\frac{{{I}_{o}}}{8}\]
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• question_answer4) When a low flying aircraft passes over head, we sometimes notice a slight shaking of the picture on our TV screen. This is due to
  A)
   diffraction of the signal received from the antenna
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  B)
   interference of the direct signal received by the antenna with the weak signal reflected by the passing aircraft
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  C)
   change of magnetic flux occurring due to the passage of aircraft
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  D)
   vibration created by the passage of aircraft
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• question_answer5) A beam of light of wavelength 600 nm from a distant source falls on a single slit I mm wide and the resulting diffraction-pattern is observed on a screen 2m away. The distance between the first dark fringes on either side of the central bright fringe is
  A)
   1.2 cm           
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  B)
   1.2 mm
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  C)
   2.4cm          
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  D)
   2.4mm
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• question_answer6) The physical quantity having the dimensions \[[{{M}^{-1}}{{L}^{-3}}{{T}^{3}}{{A}^{2}}]\] is
  A)
   resistance
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  B)
   resistivity
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  C)
   electrical conductivity
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  D)
   electromotive force
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• question_answer7) A battery of emf 10 V and internal resistance \[3\,\Omega \]is connected to a resistor. The current in the circuit is 0.5 A. The terminal voltage of the battery when the circuit is closed is
  A)
  \[10\,V\]
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  B)
  \[0\,V\]
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  C)
   \[1.5\,V\]
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  D)
   \[8.5\,V\]
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• question_answer8) A galvanometer coil has a resistance of \[15\,\Omega \] and gives full scale deflection for a current of 4 mA. To convert it to an ammeter of range 0 to 6 A
  A)
  \[10\,m\Omega \]resistance is to be connected in parallel to the galvanometer
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  B)
  \[10\,m\Omega \] resistance is to be connected in series with the galvanometer
  done clear
  C)
   \[0.1\,\Omega \]resistance is to be connected in parallel to the galvanometer
  done clear
  D)
   \[0.1\,\Omega \]resistance is to be connected in series with the galvanometer
  done clear
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• question_answer9) The electron drift speed is small and the charge of the electron is also small but still, we obtain large current in a conductor. This is due to
  A)
   the conducting property of the conductor
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  B)
   the resistance of the conductor is small
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  C)
   the electron number density of the conductor is small
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  D)
   the electron number density of the conductor is enormous
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• question_answer10) A straight wire of mass 200 g and length 1.5 m carries a current of 2 A. It is suspended in mid-air by a uniform horizontal magnetic field B. The magnitude of B (in testa) is (assume\[g=9.8\,m{{s}^{-2}}\])
  A)
   2                 
  done clear
  B)
   1.5
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  C)
   0.55              
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  D)
   0.65
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• question_answer11) A Gaussian sphere encloses an electric dipole within it. The total flux across the sphere is
  A)
   zero
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  B)
   half that due to a single charge
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  C)
   double that due to a single charge
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  D)
   dependent on the position of the dipole
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• question_answer12) A parallel plate air capacitor has a capacitance C. When it is half filled with a dielectric of dielectric constant 5, the percentage increase in the capacitance will be
  A)
   400%          
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  B)
   66.6%
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  C)
   33.3%         
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  D)
     200%
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• question_answer13) A comb run through ones dry hair attracts small bits of paper. This is due to
  A)
   comb is a good conductor
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  B)
   paper is a good conductor
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  C)
   the atoms is the paper get polarised by the charged comb
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  D)
   the comb possesses magnetic properties    
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• question_answer14) The  specific  charge  of a  proton  is \[9.6\times {{10}^{7}}C\,k{{g}^{-1}}.\] The specific charge of an alpha particle will be               
  A)
   \[9.6\times {{10}^{7}}C\,k{{g}^{-1}}\]
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  B)
   \[19.2\times {{10}^{7}}C\,k{{g}^{-1}}\]
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  C)
   \[4.8\times {{10}^{7}}C\,k{{g}^{-1}}\]
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  D)
   \[2.4\times {{10}^{7}}C\,k{{g}^{-1}}\] 
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• question_answer15) When light of wavelength 300 nm falls on a photoelectric emitter, photoelectrons are liberated. For another, emitter, light of wavelength 600 nm is sufficient for liberating photoelectrons. The ratio of the work function of the two emitters is
  A)
   1:2             
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  B)
   2:1
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  C)
   4:1             
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  D)
   1:4
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• question_answer16) White light is passed through a dilute solution of potassium  permanganate.   The  spectrum produced by the emergent light is
  A)
   band emission spectrum
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  B)
   line emission spectrum
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  C)
   band absorption spectrum
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  D)
   line absorption spectrum
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• question_answer17) If\[{{\lambda }_{1}}\] and\[{{\lambda }_{2}}\] are the wavelengths of the first members of the Lyman and Paschen series respectively, then \[{{\lambda }_{1}}:{{\lambda }_{2}}\]is
  A)
   1 : 3            
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  B)
   1 : 30
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  C)
   7 : 50           
  done clear
  D)
   7  : 108
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• question_answer18) Activity of a radioactive sample decreases to \[{{(1/3d)}^{rd}}\]of its original value in 3 days. Then, in 9 days its activity will become
  A)
   (1/27) of the original value
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  B)
   (1/9) of the original value
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  C)
   (1/18) of the original value
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  D)
   (1/3) of the original value
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• question_answer19) The working of which of the following is similar to that of a slide projector?
  A)
   Electron microscope
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  B)
   Scanning electron microscope
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  C)
   Transmission electron microscope
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  D)
  Atomic force microscope
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• question_answer20) In a transistor the collector current is always less than the emitter current bacause
  A)
   collector side is reverse biased and the emitter side is forward biased
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  B)
   a few electrons are lost in the base and only remaining ones reach the collector
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  C)
   collector being reverse/biased, attracts less electrons
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  D)
   collector side is forward biased and emitter side is reverse biased
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• question_answer21) A transparent cube of 0.21 m edge contains a small air bubble. Its apparent distance when viewed through one face of the cube is 0.10 m and when viewed from the opposite face is 0.04 m. The actual distance of the bubble from the second face of the cube is
  A)
   0.06 m          
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  B)
   0.17 m
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  C)
   0.05 m          
  done clear
  D)
   0.04 m
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• question_answer22) To a fish under water, viewing obliquely a fisherman standing on the bank of a lake, the man looks
  A)
   taller than what he actually is
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  B)
   shorter that what he actually is
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  C)
   the same height as he actually is
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  D)
   depends on the obliquity
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• question_answer23) If white light is used in the Newtons rings experiment, the colour observed in the reflected light is complementary to that observed in the transmitted light through the same point. This is due to
  A)
   \[{{90}^{o}}\]change of phase in one of the reflected waves
  done clear
  B)
   \[{{180}^{o}}\]change of phase in one of the reflected waves
  done clear
  C)
  \[{{145}^{o}}\]change of phase in one of the reflected waves
  done clear
  D)
   \[{{45}^{o}}\]change of phase in one the reflected waves
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• question_answer24) A satellite in a circular orbit of radius R has a period of 4 h. Another satellite with orbital radius 3R around the same planet will have a period (in hours)
  A)
   16
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  B)
   4
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  C)
   \[4\sqrt{27}\]
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  D)
   \[4\sqrt{8}\]
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• question_answer25) The freezer in a refrigerator is located at the top section so that
  A)
   the entire chamber of the refrigerator is cooled quickly due to convection
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  B)
   the motor is not heated
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  C)
   the heat gained from the environment is high
  done clear
  D)
   the heat gained from the environment is  low
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• question_answer26)  A monoatomic gas is suddenly compressed to  \[{{\text{(1/8)}}^{\text{th}}}\]of its initial volume adiabatically. The ratio of its final pressure to the initial pressure is (Given the ratio of the specific heats of the given gas to be 5/3)
  A)
   32              
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  B)
   40/3
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  C)
   24/5            
  done clear
  D)
   8
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• question_answer27) A Camot engine takes heat from a reservoir at \[\text{627}{{\,}^{\text{o}}}\text{C}\]and rejects heat to a sink at \[\text{27}{{\,}^{o}}\text{C}\text{.}\] Its efficiency will be
  A)
   3/5             
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  B)
   1/3
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  C)
   2/3             
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  D)
   200/209
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• question_answer28) A 30 V, 90 W lamp is to be operated on a 120 V DC line. For proper glow, a resistor of ... \[\Omega \] should be connected in series with the lamp.
  A)
   40              
  done clear
  B)
   10
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  C)
   20              
  done clear
  D)
   30
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• question_answer29) A tuning fork A produces 4 beats/s with another tuning fork B of frequency 320 Hz. On filing one of the prongs of A, 4 beats/s are again heard when sounded with the same fork B. Then, the frequency of the fork A before filing is
  A)
   328 Hz          
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  B)
   316 Hz
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  C)
   324 Hz          
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  D)
   320 Hz
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• question_answer30) The sprinkling of water reduces slightly the temperature of a closed room because
  A)
   temperature of water is less than that of the room
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  B)
   specific heat of water is high
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  C)
   water has large latent heat of vaporization
  done clear
  D)
   water is a bad conductor of heat
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• question_answer31) The equation of a simple harmonic wave is  given by \[y=5\sin \frac{\pi }{2}(100t-x),\]where \[x\]and \[y\]are in metre and time is in second. The period of the wave in second will be
  A)
   0.04
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  B)
   0.01
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  C)
   1                  
  done clear
  D)
   5
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• question_answer32) The loudness and pitch of a sound note  depends on
  A)
   intensity and frequency
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  B)
   frequency and number of harmonics
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  C)
   intensity and velocity
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  D)
   frequency and velocity
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• question_answer33) For ordinary terrestrial experiments, the observer in an inertial frame in the following cases is
  A)
   a child revolving in a giant wheel
  done clear
  B)
   a driver in a sports car moving with a constant high speed of \[200\,\text{km}{{\text{h}}^{-1}}\] on a straight rod
  done clear
  C)
   the pilot of an aeroplane which is taking off
  done clear
  D)
   a cyclist negotiating a sharp curve
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• question_answer34) A rectangular vessel when full of water, takes 10 min to be emptied through an orifice in its bottom. How much time will it take to be emptied when half filled with water?
  A)
   9 min           
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  B)
   7 min    
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  C)
   5 min          
  done clear
  D)
   3 min
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• question_answer35) If there were no gravity, which of the following will not be there for a fluid?
  A)
   Viscosity
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  B)
   Surface tension
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  C)
   Pressure
  done clear
  D)
   Archimedes upward thrust
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• question_answer36) In a LCR series circuit, the potential difference between the terminals of the inductance is 60 V, between the terminals of the capacitor is 30 V and that across the resistance is 40 V. Then, supply voltage will be equal to
  A)
   50 V            
  done clear
  B)
   70 V
  done clear
  C)
   130 V           
  done clear
  D)
   10 V      
  done clear
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• question_answer37) When deuterium and helium are subjected to an accelerating field simultaneously then
  A)
   both acquire same energy                   
  done clear
  B)
   deuterium accelerates faster          
  done clear
  C)
   helium accelerates faster               
  done clear
  D)
   neither of them is accelerated
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• question_answer38) A solenoid 1.5 m long and 0.4 cm in diameter possesses 10 turns per cm length. A current of 5 A falls through it. The magnetic field at the axis inside the solenoid is
  A)
   \[2\pi \times {{10}^{-3}}T\]
  done clear
  B)
   \[2\pi \times {{10}^{-5}}T\]
  done clear
  C)
   \[4\pi \times {{10}^{-2}}T\]
  done clear
  D)
    \[4\pi \times {{10}^{-3}}T\]
  done clear
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• question_answer39) A wire PQR is bent as shown in figure and is placed in a region of uniform magnetic field B. The length of\[PQ=QR=l.A\] current \[I\] ampere flows through the wire as shown. The  agnitude of the force on PQ and QR will be
  A)
   \[BIl,0\]
  done clear
  B)
   \[2BIl,0\]
  done clear
  C)
   \[0,BIl\]
  done clear
  D)
   \[0,0\]
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• question_answer40) A choke is preferred to a resistance for limiting current in AC circuit because
  A)
   choke is cheap
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  B)
   there is no wastage of power
  done clear
  C)
   choke is compact in size
  done clear
  D)
   choke is a good absorber of heat
  done clear
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• question_answer41) If \[{{r}_{1}}\]and \[{{r}_{2}}\]are the radii of the atomic nuclei of mass numbers 64 and 125 respectively, then  the ratio \[({{r}_{1}}/{{r}_{2}})\]is
  A)
   \[\frac{64}{125}\]
  done clear
  B)
   \[\sqrt{\frac{64}{125}}\]
  done clear
  C)
   \[\frac{5}{5}\]
  done clear
  D)
   \[\frac{4}{5}\]
  done clear
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• question_answer42) A motor is used to deliver water at a certain rate through a given horizontal pipe. To deliver \[n-\]fimes the water through the same pipe in the same time the power of the motor must be increased as follows
  A)
   \[n-\]times         
  done clear
  B)
  \[{{n}^{2}}-\] times
  done clear
  C)
   \[{{n}^{3}}-\]times         
  done clear
  D)
   \[{{n}^{4}}-\]times
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• question_answer43) Fora system to follow the law of conservation of linear momentum during a collision, the condition is (i) total external force acting on the system is zero (ii) total external force acting oh the system is finite and time of collision is negligible. (iii) total internal force acting on the system is zero.
  A)
   (i)only
  done clear
  B)
   (ii) only
  done clear
  C)
   (iii) only
  done clear
  D)
   (i)or(ii)
  done clear
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• question_answer44) An air bubble of radius 1 cm rises from the bottom portion through a liquid of density \[1.5~g/cc\]at a constant speed of \[0.25\,cm\,{{s}^{-1}}.\]If the density of air is neglected, the coefficient of viscosity of the liquid is approximately (in Pa)
  A)
   13000           
  done clear
  B)
   1300
  done clear
  C)
   130              
  done clear
  D)
   13
  done clear
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• question_answer45) A given mass of a gas is compressed isothermally until its pressure is doubled. It is then allowed to expand adiabatically until its original volume is restored and its pressure is then found to be 0.75 of its initial pressure. The ratio of the specific heats of the gas is approximately
  A)
   1.20             
  done clear
  B)
   1.41
  done clear
  C)
   1.67             
  done clear
  D)
   1.83
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• question_answer46) Two solid spheres A and B made of the same material have radii\[{{r}_{A}}\] and \[{{r}_{B}}\] respectively. Both the spheres are cooled from the same  temperature under the conditions valid for Newtons law of cooling. The ratio of the rate of change of temperature A and B is
  A)
   \[\frac{{{r}_{A}}}{{{r}_{B}}}\]
  done clear
  B)
   \[\frac{{{r}_{B}}}{{{r}_{A}}}\]
  done clear
  C)
   \[\frac{r_{A}^{2}}{r_{B}^{2}}\]
  done clear
  D)
   \[\frac{r_{B}^{2}}{r_{A}^{2}}\]
  done clear
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• question_answer47) The effect due to uniform magnetic field on a freely suspended magnetic needle is as follows
  A)
   both torque and net force are present
  done clear
  B)
   torque is present but no net force
  done clear
  C)
   both torque and net force are absent
  done clear
  D)
   net force is present but not torque
  done clear
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• question_answer48) When a positively charged particle enters a uniform magnetic field with uniform velocity, its trajectory can be (i) a straight line (ii) a circle (iii) a helix
  A)
   (i) only
  done clear
  B)
   (i)pr(ii)                                   
  done clear
  C)
   (i) or (iii)                                           
  done clear
  D)
   anyone of (i), (ii) and (iii)
  done clear
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• question_answer49) A oil drop having a mass \[4.8\times {{10}^{-10}}\]and charge \[24\times {{10}^{-18}}C\] stands still between two charged horizontal plates separated by a distance of 1 cm. If now the polarity of the plates is changed, instantaneous acceleration of the drop is ( \[g=10\,m{{s}^{-2}}\])
  A)
   \[5m{{s}^{-2}}\]
  done clear
  B)
   \[10\,m{{s}^{-2}}\]
  done clear
  C)
   \[15\,m{{s}^{-2}}\]
  done clear
  D)
   \[20\,m{{s}^{-2}}\]
  done clear
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• question_answer50) A free neutron decays spontaneously into
  A)
   a proton, an electron and anti-neutrino
  done clear
  B)
   a proton, an electron and a neutrino
  done clear
  C)
   a proton and electron
  done clear
  D)
   a proton, and electron, a neutrino and an anti-neutrino
  done clear
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• question_answer51) What is the correct order of spin only magnetic moment (in BM) of \[M{{n}^{2+}},C{{r}^{2+}}\]and \[{{V}^{2+}}\]?
  A)
  \[M{{n}^{2+}}>{{V}^{2+}}>C{{r}^{2+}}\]
  done clear
  B)
   \[{{V}^{2+}}>C{{r}^{2+}}>M{{n}^{2+}}\]
  done clear
  C)
   \[M{{n}^{2+}}>C{{r}^{2+}}>{{V}^{2+}}\]
  done clear
  D)
   \[C{{r}^{2+}}>{{V}^{2+}}>M{{n}^{2+}}\]
  done clear
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• question_answer52) Which of the following is used for making optical instruments?
  A)
  \[Si{{O}_{2}}\]
  done clear
  B)
   \[Si\]
  done clear
  C)
   \[Si{{H}_{4}}\]
  done clear
  D)
   \[SiC\]
  done clear
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• question_answer53) Which of the following is not correct?
  A)
  \[3{{O}_{2}}2{{O}_{3}};\Delta H=-284.5\,kJ\]
  done clear
  B)
   Ozone undergoes addition reaction with unsaturated carbon compounds
  done clear
  C)
   Sodium thiosulphate reacts with \[{{I}_{2}}\]to form sodium tetrathionate and sodium iodide
  done clear
  D)
   Ozone oxidises lead sulphide to lead sulphate
  done clear
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• question_answer54) Which of the following reactions can produce aniline as main product?
  A)
  \[{{C}_{6}}{{H}_{5}}NO{{}_{2}}+Zn/KOH\]
  done clear
  B)
   \[{{C}_{6}}{{H}_{5}}N{{O}_{2}}+Zn/N{{H}_{4}}Cl\]
  done clear
  C)
   \[{{C}_{6}}{{H}_{5}}N{{O}_{2}}+LiAl{{H}_{4}}\]
  done clear
  D)
  \[{{C}_{6}}{{H}_{5}}N{{O}_{2}}+Zn+HCl\]
  done clear
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• question_answer55) Which of the following reagents when heated with ethyl chloride, forms ethylene?
  A)
   Aqueous KOH
  done clear
  B)
   \[Zn/HCl\]
  done clear
  C)
   Alcoholic KOH
  done clear
  D)
   HI
  done clear
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• question_answer56) The energy of a photon is \[3\times {{10}^{-12}}\text{erg}\text{.}\] What is its wavelength in nm?             \[(h=6.62\times {{10}^{-27}}erg\,-s;c=3\times {{10}^{10}}cm/s)\]
  A)
   662             
  done clear
  B)
   1324
  done clear
  C)
   66.2             
  done clear
  D)
   6.62
  done clear
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• question_answer57) What is the time (in sec) required for depositing all the silver present in 125 mL of \[\text{1}\,\text{M}\,\text{AgN}{{\text{O}}_{\text{3}}}\]solution by passing a current of 241.25 A?\[\text{(1F}\,\text{=}\,\text{96500}\,\text{C)}\]
  A)
   10              
  done clear
  B)
   50
  done clear
  C)
   1000            
  done clear
  D)
   100
  done clear
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• question_answer58) The disperse phase, dispersion medium and nature of colloidal solution (lyophilic or lyophobic) of gold sol respectively, are
  A)
   Solid, solid, lyophobic
  done clear
  B)
   liquid, liquid, lyophobic
  done clear
  C)
   solid, liquid, lyophobic         
  done clear
  D)
   solid, liquid, lyophilic
  done clear
  View Answer play_arrow

• question_answer59) The rate constant of a first order reaction at \[\text{27}{{\,}^{o}}\text{C}\]is \[{{10}^{-3}}{{\min }^{-1}}.\]The temperature coefficient of this reaction is 2. What is the rate constant (in\[{{\min }^{-1}}\]) at \[17{{\,}^{o}}C\]for this reaction?     
  A)
  \[{{10}^{-3}}\]
  done clear
  B)
   \[5\times {{10}^{-4}}\]
  done clear
  C)
   \[2\times {{10}^{-3}}\]
  done clear
  D)
   \[{{10}^{-2}}\]
  done clear
  View Answer play_arrow

• question_answer60) A solution of an acid has \[[{{H}^{+}}]=2\times {{10}^{-5}}.\]Find out the concentration of \[\text{O}{{\text{H}}^{-}}\]ions.              
  A)
  \[5\times {{10}^{-10}}N\]
  done clear
  B)
   \[4\times {{10}^{-10}}N\]
  done clear
  C)
   \[2\times {{10}^{-5}}N\]
  done clear
  D)
   \[9\times {{10}^{-4}}N\]
  done clear
  View Answer play_arrow

• question_answer61) Which of the followingjs added to chloroform to slow down its aerial oxidation in presence of    light
  A)
   Carbonyl chloride                          
  done clear
  B)
   Ethylalcohol            
  done clear
  C)
   Sodium hydroxide                       
  done clear
  D)
  Nitric acid
  done clear
  View Answer play_arrow

• question_answer62) Which of the products is formed when acetone is reacted with barium hydroxide solution?
  A)
  \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-C{{H}_{2}}-\underset{OH}{\overset{C{{H}_{3}}}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{3}}\]
  done clear
  B)
   \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{3}}-\overset{O}{\mathop{\overset{||}{\mathop{C}}\,}}\,-\underset{OH}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{3}}\]
  done clear
  D)
   \[C{{H}_{3}}-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-\underset{C{{H}_{3}}}{\overset{OH}{\mathop{\underset{|}{\overset{|}{\mathop{C}}}\,}}}\,-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer63) When acetaldehyde is heated with Fehling solution, a red precipitate is formed. Which of the following is that?
  A)
  \[C{{u}_{2}}O\]
  done clear
  B)
   \[Cu\]
  done clear
  C)
   \[CuO\]
  done clear
  D)
   \[CuS{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer64) What is the correct order of occurrence (% by weight) in air of Ne, Ar and Kr?
  A)
  \[Ne>Ar>Kr\]
  done clear
  B)
   \[Ar>Ne>Kr\]
  done clear
  C)
   \[Ar>Kr>Ne\]
  done clear
  D)
   \[Ne>Kr>Ar\]
  done clear
  View Answer play_arrow

• question_answer65) Which of the following compounds when heated with CO at \[\text{150}{{\,}^{\text{o}}}\text{C}\]and 500 atm pressure in presence\[\text{B}{{\text{F}}_{\text{3}}}\]forms ethyl propionate?
  A)
  \[{{C}_{2}}{{H}_{5}}OH\]
  done clear
  B)
   \[C{{H}_{3}}OC{{H}_{3}}\]
  done clear
  C)
   \[{{C}_{2}}{{H}_{5}}O{{C}_{2}}{{H}_{5}}\]
  done clear
  D)
   \[C{{H}_{3}}O{{C}_{2}}{{H}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer66) Identify the reaction for which \[\Delta H\ne \Delta E\].
  A)
  \[S(rhombic)+{{O}_{2}}(g)\xrightarrow{{}}S{{O}_{2}}(g)\]
  done clear
  B)
   \[{{N}_{2}}(g)+{{O}_{2}}(g)\xrightarrow{{}}2NO(g)\]
  done clear
  C)
   \[{{H}_{2}}(g)+C{{l}_{2}}(g)\xrightarrow{{}}2HCl(g)\]
  done clear
  D)
   \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g)\]
  done clear
  View Answer play_arrow

• question_answer67) Hydrolysis of \[\text{NC}{{\text{l}}_{\text{3}}}\]gives \[\text{N}{{\text{H}}_{3}}\]and X. Which of the following is X?
  A)
  \[HCl{{O}_{4}}\]
  done clear
  B)
   \[HCl{{O}_{3}}\]
  done clear
  C)
   \[HOCl\]
  done clear
  D)
   \[HCl{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer68) What are the metal ions present in camallite?
  A)
  \[Mg,K\]
  done clear
  B)
  \[Al,Na\]
  done clear
  C)
   \[Na,Mg\]
  done clear
  D)
   \[Zn,Mg\]
  done clear
  View Answer play_arrow

• question_answer69) Ethyl chloride reacts with sodium ethoxide to form a compound A. Which of the following reactions also yields A?
  A)
  \[{{C}_{2}}{{H}_{5}}Cl,KOH(alc),\Delta \]
  done clear
  B)
   \[2{{C}_{2}}{{H}_{5}}OH,conc.{{H}_{2}}S{{O}_{4}},140{{\,}^{o}}C\]
  done clear
  C)
   \[{{C}_{2}}{{H}_{5}}Cl,Mg\](dry ether)
  done clear
  D)
   \[{{C}_{2}}{{H}_{2}}\text{dil}\text{.}\,{{H}_{2}}S{{O}_{4}},HgS{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer70) The number of sigma and pi\[(\pi )\] bonds present in benzene respectively are
  A)
   12, 6           
  done clear
  B)
   6, 6
  done clear
  C)
   6, 12           
  done clear
  D)
   12, 3
  done clear
  View Answer play_arrow

• question_answer71) Edge length of a cube is 400 pm, its body diagonal would be
  A)
   566 pm        
  done clear
  B)
   600 pm
  done clear
  C)
   500 pm        
  done clear
  D)
   693 pm
  done clear
  View Answer play_arrow

• question_answer72) The number of \[\alpha -\]particles emitted by \[{{\,}_{84}}R{{a}^{218}}\xrightarrow{{}}{{\,}_{82}}P{{b}^{206}}\]is
  A)
   3                  
  done clear
  B)
   4
  done clear
  C)
   6                  
  done clear
  D)
   2
  done clear
  View Answer play_arrow

• question_answer73) The IUPAC name of the following compound is \[C{{H}_{3}}-\underset{{{C}_{6}}{{H}_{5}}}{\mathop{\underset{|}{\mathop{CH}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\]
  A)
   2-cyclohexylbutane
  done clear
  B)
   sec-butylbenzene
  done clear
  C)
   3-cyclohexylbutane
  done clear
  D)
   2-phenylbutane
  done clear
  View Answer play_arrow

• question_answer74) The reaction of primary amine with chloroform and ethanolic solution of KOH is called
  A)
  Hofmanns reaction
  done clear
  B)
   Reimer-Tiemanns reaction
  done clear
  C)
   Carbylamine reaction
  done clear
  D)
   Kolbes reaction
  done clear
  View Answer play_arrow

• question_answer75) 0.01 mole of a non-electrolyte is dissolved in 10 g of water. The molality of the solution is
  A)
   0.1 m
  done clear
  B)
   0.5 m
  done clear
  C)
   1.0 m             
  done clear
  D)
   0.18 m
  done clear
  View Answer play_arrow

• question_answer76) Atoms with same atomic number and different mass numbers are called
  A)
   isobars          
  done clear
  B)
   isomers
  done clear
  C)
   isotones         
  done clear
  D)
   isotopes
  done clear
  View Answer play_arrow

• question_answer77) The shape of the orbital with the value of \[l=2\]and \[m=0\]is
  A)
   spherical
  done clear
  B)
   dumb-bell
  done clear
  C)
   trigonal planar
  done clear
  D)
   square-planar
  done clear
  View Answer play_arrow

• question_answer78) In the following, the element with the highest ionisation energy is
  A)
  \[[Ne]3{{s}^{2}}3{{p}^{1}}\]
  done clear
  B)
   \[[Ne]3{{s}^{2}}3{{p}^{3}}\]
  done clear
  C)
   \[[Ne]3{{s}^{2}}3{{p}^{2}}\]
  done clear
  D)
   \[[Ne]3{{s}^{2}}3{{p}^{4}}\]
  done clear
  View Answer play_arrow

• question_answer79) In the conversion of \[B{{r}_{2}}\]to \[BrO_{3}^{-},\]the oxidation number of Br changes from
  A)
  \[\text{zero to}+5\]       
  done clear
  B)
  \[+\,1\,\text{to}\,\text{+}\,\text{5}\]
  done clear
  C)
  \[\text{ }\!\!~\!\!\text{ zero to}-3\]       
  done clear
  D)
  \[~+\,2\text{ to}+5\]
  done clear
  View Answer play_arrow

• question_answer80) Among the alkali metals cesium is the most reactive because
  A)
   its incomplete shell is nearest to the nucleus
  done clear
  B)
   it has a single electron in the valence shell
  done clear
  C)
   it is the heaviest alkali metal
  done clear
  D)
   the outermost electron is more loosely bound than the outermost electron of the other alkali metals
  done clear
  View Answer play_arrow

• question_answer81) Which of the following represents the Lewis structure of \[{{\text{N}}_{\text{2}}}\]molecule?
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer82) Hydrogen bond is strongest in
  A)
  \[S-H...O\]
  done clear
  B)
   \[O-H...S\]
  done clear
  C)
   \[F-H...F\]
  done clear
  D)
   \[O-H...N\]
  done clear
  View Answer play_arrow

• question_answer83) The density of a gas is \[1.964\,g\,d{{m}^{-3}}\] at 273 K   and 76cmHg. The gas is
  A)
  \[C{{H}_{4}}\]
  done clear
  B)
   \[{{C}_{2}}{{H}_{6}}\]
  done clear
  C)
   \[C{{O}_{2}}\]
  done clear
  D)
   \[Xe\]
  done clear
  View Answer play_arrow

• question_answer84) The shape of \[\text{PC}{{\text{l}}_{\text{3}}}\]molecule is
  A)
   trigonal bipyramidal
  done clear
  B)
   tetrahedral
  done clear
  C)
   pyramidal
  done clear
  D)
   square planar
  done clear
  View Answer play_arrow

• question_answer85) The concentration of a reactant X decreases from 0.1 M to 0.005 M in 40 min. If the reaction follows first order kinetics, the rate of the reaction when the concentration of X is 0.01 M will be
  A)
   \[1.73\,\times {{10}^{-4}}\,M{{\min }^{-1}}\]
  done clear
  B)
   \[3.47\times {{10}^{-4}}M\,{{\min }^{-1}}\]
  done clear
  C)
   \[3.47\times {{10}^{-5}}M\,{{\min }^{-1}}\]
  done clear
  D)
   \[7.5\times {{10}^{-4}}M\,{{\min }^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer86) Which of the following does not conduct electricity?
  A)
   Fused NaCI      
  done clear
  B)
   Solid NaCI
  done clear
  C)
   Brine solution    
  done clear
  D)
   Copper
  done clear
  View Answer play_arrow

• question_answer87) Solubility product of a salt AB is \[1\times {{10}^{-8}}{{M}^{2}}\,\]in a solution in which the concentration of \[{{A}^{+}}\]ions is \[{{10}^{-3}}\,M.\]The salt will precipitate when the concentration of \[{{B}^{-}}\]ions is kept
  A)
   between \[{{10}^{-8}}\,M\]to \[{{10}^{-7}}\,M\]
  done clear
  B)
   between \[{{10}^{-7}}M\]to \[{{10}^{-8}}M\]
  done clear
  C)
   \[>{{10}^{-5}}M\]
  done clear
  D)
   \[<{{10}^{-8}}M\]
  done clear
  View Answer play_arrow

• question_answer88) The pH of \[{{10}^{-8}}\,M\,HCl\]solution is
  A)
   8
  done clear
  B)
   more than 8
  done clear
  C)
   between 6 and 7
  done clear
  D)
   slightly more than 7
  done clear
  View Answer play_arrow

• question_answer89) For a reaction to be spontaneous at all temperatures
  A)
   \[\Delta G\]and \[\Delta H\]should be negative
  done clear
  B)
   \[\Delta G\]and\[\Delta H\] should be positive
  done clear
  C)
   \[\Delta G=\Delta S=0\]
  done clear
  D)
   \[\Delta H=\Delta G\]
  done clear
  View Answer play_arrow

• question_answer90) Which of the following electrolytes will have maximum flocculation value for \[Fe{{(OH)}_{3}}sol\]
  A)
  \[NaCl\]
  done clear
  B)
   \[N{{a}_{2}}S\]
  done clear
  C)
   \[{{(N{{H}_{4}})}_{3}}P{{O}_{4}}\]
  done clear
  D)
   \[{{K}_{2}}S{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer91) What is the order of a reaction which has, a  rate expression                 \[rate=k{{[A]}^{3/2}}{{[B]}^{-1}}?\]
  A)
  \[\frac{3}{2}\]
  done clear
  B)
   \[\frac{1}{2}\]
  done clear
  C)
   0
  done clear
  D)
   \[\frac{4}{2}\]
  done clear
  View Answer play_arrow

• question_answer92) Inductive effect involves
  A)
   displacement of o-electrons
  done clear
  B)
   delocalisation of Ti-electrons
  done clear
  C)
   delocalisation of o-electrons
  done clear
  D)
   displacement of Ti-electrpns
  done clear
  View Answer play_arrow

• question_answer93) Which of the following compound is expected to be optically active?
  A)
  \[{{(C{{H}_{3}})}_{2}}CHCHO\]
  done clear
  B)
   \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}CHO\]
  done clear
  C)
   \[C{{H}_{3}}C{{H}_{2}}CHBrCHO\]
  done clear
  D)
   \[C{{H}_{3}}C{{H}_{2}}CB{{r}_{2}}CHO\]
  done clear
  View Answer play_arrow

• question_answer94) The catalyst used in the preparation of an alkyl chloride by the action of dry HC1 on an alcohol is
  A)
   anhydrous \[AlC{{l}_{3}}\]
  done clear
  B)
  \[FeC{{l}_{3}}\]
  done clear
  C)
   anhydrous\[ZnC{{l}_{2}}\]
  done clear
  D)
   Cu
  done clear
  View Answer play_arrow

• question_answer95) By heating phenol with chloroform in alkali, it is converted into
  A)
   salicylic acid      
  done clear
  B)
   salicylaldehyde
  done clear
  C)
   anisole           
  done clear
  D)
   phenyl benzoate
  done clear
  View Answer play_arrow

• question_answer96) Which of the following does not give benzoic acid on hydrolysis?
  A)
   Phenyl cyanide   
  done clear
  B)
   Benzoyl chloride
  done clear
  C)
   Benzyl chloride   
  done clear
  D)
   Methyl benzoate
  done clear
  View Answer play_arrow

• question_answer97) Glucose contains in addition to aldehyde group
  A)
   one secondary-OH and four primary-OH groups
  done clear
  B)
   one primary-OH and four secondary-OH groups
  done clear
  C)
   two primary-OH and three secondary-OH groups
  done clear
  D)
   three primary-OH and two secondary-OH group
  done clear
  View Answer play_arrow

• question_answer98) The formula mass of Mohrs salt is 392. The iron present in it is oxidised by \[\text{Kmn}{{\text{O}}_{\text{4}}}\]in acid medium. The equivalent mass of Mohrs salt is
  A)
   392             
  done clear
  B)
   31.6
  done clear
  C)
   278             
  done clear
  D)
   156
  done clear
  View Answer play_arrow

• question_answer99) The brown ring test for nitrates depends on
  A)
   the  reduction of nitrate to nitric oxide
  done clear
  B)
   oxidation of nitric oxide to nitrogen dioxide
  done clear
  C)
   reduction of ferrous sulphate to iron
  done clear
  D)
   oxidising action of sulphuric acid
  done clear
  View Answer play_arrow

• question_answer100) Which of the following solutions will exhibit highest boiling point?
  A)
  \[\text{0}\text{.01M}\,\text{N}{{\text{a}}_{\text{2}}}S{{O}_{4}}(aq)\]
  done clear
  B)
  \[\text{0}\text{.01M}\,\text{KN}{{\text{O}}_{\text{3}}}(aq)\]
  done clear
  C)
   \[0.015\,\text{M}\,\text{urea}\,\text{(aq)}\]
  done clear
  D)
   \[0.015\,\text{M}\,\text{glucose(aq)}\]
  done clear
  View Answer play_arrow

• question_answer101) When \[\text{C}{{\text{O}}_{\text{2}}}\]concentration in blood increases, breathing becomes
  A)
   shallower and slow
  done clear
  B)
   there is, no effect on breathing
  done clear
  C)
   slow and deep
  done clear
  D)
   faster and deeper
  done clear
  View Answer play_arrow

• question_answer102) Cancer cells are more easily damaged by radiation than normal cells because they are
  A)
   starved of mutation
  done clear
  B)
   undergoing rapid division
  done clear
  C)
   different in structure
  done clear
  D)
   non-dividing
  done clear
  View Answer play_arrow

• question_answer103) Which one of the following is not correctly matched?
  A)
   Glossina palpalis          -            Sleeping sickness
  done clear
  B)
   Culex                             -            Filariasis
  done clear
  C)
   Aedes aegypti              -            Yellow fever
  done clear
  D)
  Anopheles culifacies   -            Leishmaniasis
  done clear
  View Answer play_arrow

• question_answer104) A free living nitrogen fixing cyanobacterium which can also form symbiotic association with the water fem Azolla is
  A)
   Tolypothrix       
  done clear
  B)
   Chlorella
  done clear
  C)
   Nostoc            
  done clear
  D)
   Anabaena
  done clear
  View Answer play_arrow

• question_answer105) Which of the following hormones is not a secretion product of human placenta?
  A)
   Human chorionic gonadotropin
  done clear
  B)
   Prolactin             
  done clear
  C)
   Estrogen
  done clear
  D)
   Progesterone
  done clear
  View Answer play_arrow

• question_answer106) The cardiac pace maker in a patient fails to function normally. The doctors find that an artificial pace maker is to be grafted in him. It is likely that it will be grafted at the site of
  A)
   atrioventricular bundle
  done clear
  B)
   Plirkinje system
  done clear
  C)
   sinuatrial node
  done clear
  D)
   atrioventricular node
  done clear
  View Answer play_arrow

• question_answer107) Flagella of prokaryotic and eukaryotic cells differ in
  A)
   type of movement and placement in cell
  done clear
  B)
   location in cell and mode of functioning
  done clear
  C)
   micro-tubular organization and type of movement                
  done clear
  D)
   micro-tubular organization and function
  done clear
  View Answer play_arrow

• question_answer108) The animal with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage belongs to the phylum
  A)
   Annelida         
  done clear
  B)
   Mollusca
  done clear
  C)
   Cnidaria         
  done clear
  D)
   Echinodermata
  done clear
  View Answer play_arrow

• question_answer109) Lack of independent assortment of two genes- A and B in fruit fly-Drosophila is due to
  A)
   repulsion         
  done clear
  B)
   recombination
  done clear
  C)
   linkage           
  done clear
  D)
   crossing over
  done clear
  View Answer play_arrow

• question_answer110) Which of the following is expected to have the highest value \[(gm/{{m}^{2}}/yr)\] in a grassland ecosystem?                           
  A)
   Secondary Production (SP)              
  done clear
  B)
   Tertiary Production (TP)
  done clear
  C)
   Gross Production (GP)        
  done clear
  D)
   Net Production (NP)                    
  done clear
  View Answer play_arrow

• question_answer111) In 1984, the Bhopal gas tragedy took place because methyl isocyanate
  A)
   reacted with DDT
  done clear
  B)
   reacted with ammonia
  done clear
  C)
   reacted with \[\text{C}{{\text{O}}_{\text{2}}}\]
  done clear
  D)
   reacted with water
  done clear
  View Answer play_arrow

• question_answer112) The technique of obtaining large number of plantlets by tissue culture method is called
  A)
   plantlet culture
  done clear
  B)
   organ culture
  done clear
  C)
   micro-propagation
  done clear
  D)
   All of the above        
  done clear
  View Answer play_arrow

• question_answer113) One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light and it did not produce flower. Under which one of the following categories will you place this plant?
  A)
   Long day         
  done clear
  B)
   Darkness neutral
  done clear
  C)
   Day neutral       
  done clear
  D)
   Short day
  done clear
  View Answer play_arrow

• question_answer114) Which one of the following hormone is a modified amino acid?
  A)
   Epinephrine      
  done clear
  B)
   Progesterone
  done clear
  C)
   Prostaglandin     
  done clear
  D)
   Estrogen
  done clear
  View Answer play_arrow

• question_answer115) In\[{{\text{C}}_{\text{3}}}\]plants, the first stable product of photosynthesis during the dark reaction is
  A)
   malic acid
  done clear
  B)
   oxaloacetic acid
  done clear
  C)
   3-phosphoglyceric acid     
  done clear
  D)
   phosphoglyceraldehyde
  done clear
  View Answer play_arrow

• question_answer116) The maximum growth rate occurs in
  A)
   stationary phase  
  done clear
  B)
   senescent phase
  done clear
  C)
   lag phase         
  done clear
  D)
   exponential phase
  done clear
  View Answer play_arrow

• question_answer117) Anthesis is a phenomenon which refers to
  A)
   reception of pollen by stigma
  done clear
  B)
   formation of pollen
  done clear
  C)
   development of anther
  done clear
  D)
   opening of flower bud
  done clear
  View Answer play_arrow

• question_answer118) Cell elongation in intemodal regions of the green plants takes place due to
  A)
   indole acetic acid  
  done clear
  B)
   cytokinins
  done clear
  C)
   gibberellins       
  done clear
  D)
   ethylene
  done clear
  View Answer play_arrow

• question_answer119) A nutritionally wild type organism, which does not require any additional growth supplement is known as                           
  A)
   phenotype       
  done clear
  B)
   holotype
  done clear
  C)
   auxotroph        
  done clear
  D)
   prototroph
  done clear
  View Answer play_arrow

• question_answer120) Which of the following propagates through leaf-tip?  
  A)
   Walking fem     
  done clear
  B)
   Sprout-leaf plant
  done clear
  C)
   Marchantia       
  done clear
  D)
   Moss
  done clear
  View Answer play_arrow

• question_answer121) Common indicator organism of water pollution is
  A)
   Lemna pancicostata
  done clear
  B)
   Eichhomia crassipes
  done clear
  C)
   Escherichia coli
  done clear
  D)
   Entamoeba histolytica
  done clear
  View Answer play_arrow

• question_answer122) According to Oparin, which one of the following was not present in the primitive atmosphere of the earth?
  A)
   Methane         
  done clear
  B)
   Oxygen
  done clear
  C)
   Hydrogen        
  done clear
  D)
   Water vapour
  done clear
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• question_answer123) Which one of the following precedes re-formation of the nuclear envelope during M-phase of the cell cycle?
  A)
   Decondensation from chromosomes and reassembly of the nuclear lamina
  done clear
  B)
   Transcription from chromosomes and reassembly of the nuclear lamina
  done clear
  C)
   Formation of the contractile ring and formation of the phragmoplast
  done clear
  D)
   Formation of the contractile ring and transcription from chromosomes
  done clear
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• question_answer124) In transgenics, expression of transgene in target tissue is determined by
  A)
   enhancer         
  done clear
  B)
   transgene
  done clear
  C)
   promoter         
  done clear
  D)
   reporter
  done clear
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• question_answer125) One of the ex situ conservation method for endangered species is
  A)
   wild-life sanctuaries
  done clear
  B)
   biosphere reserves
  done clear
  C)
   cryopreservation  
  done clear
  D)
   national parks
  done clear
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• question_answer126) The Cri-du-chat syndrome is caused by change in chromosome structure involving
  A)
   deletion          
  done clear
  B)
   duplication
  done clear
  C)
   inversion         
  done clear
  D)
   translocation
  done clear
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• question_answer127) When synapsis is complete all along the chromosome, the cell is said to have entered a stage called
  A)
   zygotene        
  done clear
  B)
   pachytene
  done clear
  C)
   diplotene         
  done clear
  D)
   diakinesis
  done clear
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• question_answer128) How does pruning help in making the hedge dense?
  A)
   It induces the differentiation of new shoots from the rootstock
  done clear
  B)
   It frees axillary buds from apical dominance
  done clear
  C)
   The apical shoot grows faster after pruning
  done clear
  D)
   It releases wound hormones
  done clear
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• question_answer129) Which one of the following statements is correct?
  A)
   Neurons regulate endocrine activity, but not vice versa
  done clear
  B)
   Endocrine glands regulate neural activity and nervous system regulates endocrine glands
  done clear
  C)
   Neither hormones control neural activity nor the neurons control endocrine activity
  done clear
  D)
   Endocrine glands regulate neural activity but not vice versa
  done clear
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• question_answer130) Examination of blood of a person suspected of having anaemia, shows large, immature, nucleated erythrocytes without haemoglobin. Supplementing his diet with which of the following, is likely to alleviate his symptoms?
  A)
   Thiamine
  done clear
  B)
   Folic acid and cobalamine
  done clear
  C)
   Riboflavin
  done clear
  D)
   Iron compounds
  done clear
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• question_answer131) In which of the following fruit the edible part is the aril?
  A)
   Apple            
  done clear
  B)
   Pomegranate
  done clear
  C)
   Orange          
  done clear
  D)
   Litchi
  done clear
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• question_answer132) Which one of the following amino acid was not found to be synthesized in Millers experiment?
  A)
   Glycine           
  done clear
  B)
   Aspartic acid
  done clear
  C)
   Glutamic acid     
  done clear
  D)
   Alanine
  done clear
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• question_answer133) Which one of the following is not used for construction of ecological pyramids?
  A)
   Dry weight
  done clear
  B)
   Number of individuals
  done clear
  C)
   Rate of energy flow
  done clear
  D)
   Fresh weight
  done clear
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• question_answer134) Treatment of seed at low temperature under moist conditions to break its dormancy is  called
  A)
   scarification      
  done clear
  B)
   vernalization
  done clear
  C)
   chelation         
  done clear
  D)
   stratification
  done clear
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• question_answer135) Which one of the following is the most suitable, medium for culture of Drosophila melanogaster?
  A)
   Moist-bread      
  done clear
  B)
   Agar agar
  done clear
  C)
   Ripe banana      
  done clear
  D)
   Cow dung
  done clear
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• question_answer136) The thalloid body of a slime mould (Myxomycetes) is known as
  A)
   protonema       
  done clear
  B)
   Plasmodium
  done clear
  C)
   fruiting body     
  done clear
  D)
   mycelium
  done clear
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• question_answer137) In which mode of inheritance do you expect more maternal influence among the offspring?
  A)
   Autosomal       
  done clear
  B)
   Cytoplasmic
  done clear
  C)
   Y-linked          
  done clear
  D)
   X-linked
  done clear
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• question_answer138) What type of placentation is seen in sweet pea?
  A)
   Basal            
  done clear
  B)
   Axile
  done clear
  C)
   Free central       
  done clear
  D)
   Marginal
  done clear
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• question_answer139) An organic substance bound to an enzyme and essential for its activity is called
  A)
   coenzyme        
  done clear
  B)
   holoenzyme
  done clear
  C)
   apoenzyme       
  done clear
  D)
   isoenzyme
  done clear
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• question_answer140) Evolutionary history of an organism is known as
  A)
   phylogeny        
  done clear
  B)
   ancestry
  done clear
  C)
   paleontology     
  done clear
  D)
   ontogeny
  done clear
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• question_answer141) Sertoli cells are regulated by the pituitary hormone known as
  A)
   FSH              
  done clear
  B)
   GH
  done clear
  C)
   prolactin        
  done clear
  D)
   LH
  done clear
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• question_answer142) Antiparallel strands of a DNA molecule means that
  A)
   one strand turns anti-clockwise
  done clear
  B)
   the phosphate groups of two DNA strands at their ends, share the same position
  done clear
  C)
   the phosphate groups at the start of two  DNA strands are in opposite position (pole)
  done clear
  D)
   one strand turns clockwise
  done clear
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• question_answer143) Restriction endonuclease
  A)
   cuts the DNA molecule randomly
  done clear
  B)
   cuts the DNA molecule at specific sites
  done clear
  C)
   restricts the synthesis of DNA inside the nucleus
  done clear
  D)
   synthesizes DNA
  done clear
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• question_answer144) Earthworms are
  A)
   ureotelic when plenty of water is available
  done clear
  B)
   uricotelic when plenty of water is available
  done clear
  C)
   uricotelic under conditions of water scarcity
  done clear
  D)
   ammonotelic when plenty of water is available
  done clear
  View Answer play_arrow

• question_answer145) Which one of the following has an open circulatory system?
  A)
   Pheretima         
  done clear
  B)
   Periplaneta
  done clear
  C)
   Hirudinaria       
  done clear
  D)
   Octopus
  done clear
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• question_answer146) Biradial symmetry and lack of cnidoblasts are the characteristics of
  A)
   Starfish and sea anemone
  done clear
  B)
   Ctenoplana and Beroe
  done clear
  C)
   Aurelia and Paramecium
  done clear
  D)
   Hydra and starfish
  done clear
  View Answer play_arrow

• question_answer147) In order to obtain virus- free plants through tissue culture, the best method is
  A)
   protoplast culture
  done clear
  B)
   embryo rescue
  done clear
  C)
   anther culture     
  done clear
  D)
   meristem culture
  done clear
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• question_answer148) Both sickle cell anaemia and Huntingtons chorea are
  A)
   bacteria-related diseases
  done clear
  B)
   congenital disorders
  done clear
  C)
   pollutant-induced disorders
  done clear
  D)
   virus-related diseases
  done clear
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• question_answer149) Which one of the following pairs is not correctly matched?
  A)
   Vitamin \[{{B}_{12}}\]    -   Pernicious anaemia
  done clear
  B)
   Vitamin\[{{B}_{6}}\]      -   Loss of appetite
  done clear
  C)
   Vitamin\[{{B}_{1}}\]       -   Beri-beri
  done clear
  D)
   Vitamin\[{{B}_{2}}\]      -   Pellagra
  done clear
  View Answer play_arrow

• question_answer150) Injury to vagus nerve in human is not likely to affect
  A)
   tongue movements
  done clear
  B)
   gastrointestinal movements
  done clear
  C)
   pancreatic secretion
  done clear
  D)
   cardiac movements
  done clear
  View Answer play_arrow