If an aircraft executes a horizontal loop of radius 1 km with a constant speed of 900 km/h, then ratio of centripetal acceleration with acceleration due to gravity.
Time period of a freely suspended thin magnet is 8 s. If it is broken in length into two equal parts and one part is suspended in the same way, then its time period in seconds will be
The transfer characteristics of a base biased transistor has the operations, namely, cut-off, active region and saturation region. For using transistor as an amplifier, it has to operates in the
A concave mirror of focal length 20 cm produces an image twice the size of the object. If the image is real, then the distance of the object from the mirror is
A block of mass m, attached to a spring of spring constant k, oscillates on a smooth horizontal table. The other end of a spring is fixed to a wall. The block has a speed v, when the spring is at its natural length. Before coming to an instantaneous rest if the block moves a distance x from the mean position, then
The electric potential V at any point (x, y, z) in space is given according to relation\[\operatorname{V} = 2{{x}^{2}}V\]. The electric field intensity at the point (2m, 0, 2m) will be
If two trains of 122 m and 98 m in length are running in opposite directions with velocities 40 km/h and 32 km/h. The time after which they will cross each other is
Two coherent sources of intensity ratio \[\beta \] interfere. Then the value of \[\left( {{\operatorname{I}}_{max}}-{{\operatorname{I}}_{min}} \right)/\left( {{\operatorname{I}}_{max}}+{{\operatorname{I}}_{min}} \right)\] is
A ball of mass M is fixed to one end of a light spring of force constant k and unstretched length L as shown in figure. If the system is rotated about the other end of the spring with an angular velocity \[\omega \] in frictionless horizontal surface then the increase in length of the spring will be
A radioactive nucleus of mass number A, initially at rest, emits an \[\alpha -particle\] with a speed v. The recoil speed of the daughter nucleus will be
A uniform chain of length L and mass M is lying on a smooth table and 1/6 of its length is hanging drawn over the edge of table. If g is acceleration due to gravity, the work done to pull the hanging part on the table is
Circular loop of a wire and a long straight wire carry currents\[{{I}_{c}}\,and\,\,{{I}_{e}}\], respectively as shown in figure. Assuming that these are placed in the same plane. The magnetic field will be zero at the centre of the loop when the separation H is
Decay constant of a radio isotope is \[\lambda \] .If \[{{A}_{1}}\,and\,\,{{A}_{2}}\] be its activity at time \[{{t}_{1}}\,and\,\,{{t}_{2}}\]respectively, the number of nuclei which have decayed during the time \[\left( {{t}_{1}}\,-\,\,{{t}_{2}} \right)\] is
Consider an electron in the \[{{n}^{th}}\] orbit of a hydrogen atom in the Bohr model. The circumference of the orbit can be expressed in terms of the de-Broglie wavelength \[\lambda \] of the electron as
Step up transformer operator on a 230V line and a load current of 2 A. The ratio of primary and secondary winding is\[1:25\]. The current in primary is
Resonance frequency of \[\operatorname{L}-C-R\] series AC circuit is \[{{f}_{0}}\]. Now the capacitance is made 4 times, then the new resonance frequency will be
Light from two coherent sources of the same amplitude A and wavelength\[\lambda \], illuminator the screen. The intensity of the central maximum is \[{{I}_{0}}\]. If the sources ivere incoherent, the intersity at the same point will be
Cathode rays travelling from East to West enter into a region of electric field directed towards North to South in the plane of paper. The deflection of cathode rays is towards
A radioactive element has a half-life of 12.5 years against beta decay. The fraction of a sample of element that will remain undecayed after 25 years is
The dip at a place in \[\delta \]. For measuring it, the axis of the dip needle is perpendicular to the magnetic meridian if the axis of the dip needle makes an angle \[\theta \] with the magnetic meridian, the apparent dip will be
A magnetic field of \[2 \times 1{{0}^{-}}^{2}\] T acts at right angles to a coil of area\[100 c{{m}^{2}}\], with 50 turns. The average emf induced in the coil is 0.1 V, when it is removed from the coil in t s. The value of t is
The root mean square velocity of the gas is 300 m/s. What will be the root mean square speed of the molecules, if the atomic weight is double and absolute temperature is halved?
A lens is placed between a source of light and a wall. It forms images of area \[{{\operatorname{A}}_{1}}and\,\,{{A}_{2}}\] on the wall, for its two different positions. The area of the source of light is
A uniform long tube is bent as shown. It lies in verticle plane. Two liquids of same volume but densities P and \[\delta \] fill half the tube. The angle \[\theta \] is
Boron exists in nature as two naturally occurring isotopes having atomic weights 10.01 and 11.01. Atomic weight of naturally occurring boron is 10.01. The relative isotopic abundance of isotopes are
Carbohydrates are polyhydroxy aldehydes or polyhydroxy ketones or compounds which can be hydrolysed to one of these. Which of the following statement is incorrect regarding carbohydrate?
PVC is a thermoplastic which is used for making sheets, rain coats, table clothes, plastic dolls etc. Addition homopolymer is the nature of polymer obtained by the repeated addition of single monomer unit then, which of the following is a monomer unit of PVC?
Glucose is a monosaccharide, aldohexose and reducing sugar. In the combined state, if occur in glucosides, dissaccharides and polysaccharides. Glucose on reaction with \[B{{r}_{2}}/{{H}_{2}}O\] produces
Among the aldehydes and ketones, "the size of alkyl group is inversely proportional to their reactivity". Cannizzaro reaction is an example of disproportionation reaction i.e., self oxidation-reduction. Which of the following will undergo Cannizaro reaction?
Benzoin condensation is the chemical properties of aromatic aldehydes only. The resultant product of this reaction is a-hydroxy ketones. Reagent used in benzoin condensation is
Perkin condensation is an example of chemical properties of aromatic aldehydes only. In this reaction aromatic aldehydes condense with an acid anhydride to yield a, (3 unsaturated acids. Intermediate involved in Perkin reaction is
An organic compound containing nitrogen atom is when treated with the mixture of reagent used in Riemer Tiemann reaction reagent in \[1 : 3\] ratio, it produces methyl isocyanide. The organic compound is
The separation of primary, secondary and tertiary amines can be done through fractional distillation. Which of the following method will not used to distinguish primary, secondary and tertiary amine?
The sulphonation of aromatic hydrocarbon comes under electrophilic substitution reaction. Generally, it is difficult to introduce more than one substituent at the aromatic hydrocarbon. Which of the following reagent is involved in sulphonation of aromatic hydrocarbon?
The qualitative analysis of an organic compound implies the detection of all major elements which can be present in it with the help of suitable chemical tests. Lassaigne's method cannot be used to analysis of organic compound containing
What will be the final product of following reaction? \[C{{H}_{3}}-C\equiv C\,-\,\,C{{H}_{3}}\,\xrightarrow{B{{r}_{2}}/CC{{l}_{4}}}\] Choose the correct answer.
Number of \[{{H}^{+}}\] delivered by an acid in its aqueous solution is called basicity or protocity of the acid. The acids are referred to as monobasic, dibasic, tribasic etc., according as the number of protons given in aqueous solution are one, two or three. Which of the following is most acidic in nature?
Bond angle is the angle between the bonded orbitals. Generally, it decreases as the number of lone pair of electrons increases or as the electronegativity of the central atom decreases. Which of the following set of species has same bond angle around central atom?
If the last electron (i.e., the differentiating electron) occupies 5f-orbital, the element is said to belong 5f-series. In this series, if ions having \[5{{f}^{0}},\,5{{f}^{7}}\,and\,\,5{{f}^{14}}\] are colourless. The colour of \[{{U}^{3+}}\] is red which is due to
Metal oxides are basic i.e., form alkaline solutions when dissolved in water. Similarly, non-metal oxides are acidic while semi-metal oxides are amphoteric in nature. Most basic oxide among following is
Square planar complexes show cis-trans isomerism. Any complex of the type \[M{{A}_{2}}{{B}_{2}}\] can exist in cis-trans form. Cis form of diamminedichloroplatinate (II) is used as an
Effective atomic number abbreviated as, EAN, which is defined as the resultant number of electrons with the metal atom or ion after gaining electrons from the donor atoms of the ligand. EAN of \[{{\left[ Ni\,{{\left( CN \right)}_{4}} \right]}^{\,2\,-}}\] is
The radial function depends upon quantum number n and l whereas angular functions depend upon quantum numbers I and m, i.e., these are independent of n. The total wave function may therefore, be written as \[\psi (r,\,\,\theta ,\,\,\phi )=\,\,\,\underset{(radical\,part)}{\mathop{{{r}_{nl}}}}\,+\,\,\,\underset{(angular\,\,part)}{\mathop{{{\theta }_{l,m}}\,\,{{\phi }_{n}}}}\,\] The number of radial node present in 4d-orbital is
Hund's rule of maximum multiplicity is the rules for filling of electrons in orbitals. For the practical evaluating of this rule, the term "maximum multiplicity" is added in the rule. According to Hund's rule, which of the following is incorrectly filled?
The process of gangue removal or increase in concentration of ore depends upon the nature of ore and the impurities present in it. Froth floatation process is an important method for the concentration of the ore. Which of the following ores involves the froth floatation method during extraction of metal?
The values of standard electrode potentials of \[Z{{n}^{2+}}\]/ Zn and \[A{{g}^{+}}\] / Ag are - 0.763V and + 0.799V respectively. The standard potential of the cell is
\[C{{l}_{2}} (g)+3{{F}_{2}}(g)\,\,\,2Cl{{F}_{3}}(g);\,\,\Delta H,=-\,329kJ\] The above reaction represents an exothermic process. Which of the following will increase quantity of \[Cl{{F}_{3}}\] in an equilibrium mixture?
For the chemical reaction\[{{\operatorname{N}}_{2}}{{O}_{4}}(g)\,\,=\,\,-\,2N{{O}_{2}}(g)\] The observed molecular weight of \[{{\operatorname{N}}_{2}}{{O}_{4}}\] is \[60 g mo{{l}^{-}}^{1}\] at 300 K. The percentage dissociation of \[{{\operatorname{N}}_{2}}{{O}_{4}}\] (g) at 300 K is
4 mol of X and 4 mol of V are mixed together. For the reaction \[X+Y\,\,\,P+Q\,\], 2 mol of P and Q are formed at equilibrium. The equilibrium constant for the reaction will be
What will be the temperature at which liquid and vapour of water will be at equilibrium with each other? Given data are \[\Delta {{H}_{vap}}=\,\,40.73\,kJ\,mo{{l}^{-}}^{1}\] \[\Delta {{S}_{vap}}=\,\,0.109\,kJ\,mo{{l}^{-}}^{1}{{K}^{-\,1}}\]
For every 10 degree rise in temperature rate of reaction become double. Then, if the temperature is increased by \[60{}^\circ C\], the rate of reaction increase by
Calculate the limiting molar conductivity of NaBr. If limiting molar conductivities of NaCl, KBr and KCl are 126, 152 and \[150 s c{{m}^{2}}\,mo{{l}^{-\,1}}\]respectively.
Osmotic pressure method is the most useful method for determining the molecular weight of macromolecules. The hydrostatic pressure developed as a result of osmosis is a measure of osmotic pressure. Osmotic pressure of a 0.02 M cane sugar solution at 300 K is \[(R =0.0821 L atm degree{{ }^{-}}^{1}mol{{ }^{-}}^{1})\]
Molarity is the number of moles of solute present in one litre of the solution obtained by mixing 150 mL 0.48 M \[{{H}_{2}}S{{O}_{4}}\] with 0.26 M\[{{H}_{2}}S{{O}_{4}}\]. What is the molarity of the resultant solution?
Blackbuck (Antilope cervicaprd) which belongs to family-Boridae, Order-Cetartiodactyla, class-Mammalia and phyllum-Chordata, has been classified by IUCN as
An individual is suffering from bone pain, bone fractures, tiredness (due to anaemia), frequent or recurrent infections such as bacterial (pneumonia, urinary tract infections and shingles), kidney damage and a high level of calcium in blood (hypercalcaemia). He might be suffering from
The class of bacteria which inhabit in the soil are poor in oxygen and converts the nitrates into nitrites and then free nitrogen, such bacteria are termed as
The 18 year old first time mother is conrerned about her 7 day old infant. She is asking about breast feeding. From the following suggestions select those, which you would prefer to give has
I. If you (mother) find that baby is not satisfied (comfortable) after breast feeding, you can offer some additional luquide to him.
II. Please follow the exclusive breast feeding for 6 months
III. Breast feed your baby at a regular interval of 6 hours
IV. Breast feed your baby at least 8 to 12 times in a day
A)
I would give all of the above suggestions to the mother
In our country, many infants are being neglected by their parents, due to which they (infants) are not getting proper foods. Such infants would show one of the following sign
Raman is a 20 year old junior in college. He is majoring in biology and hopes someday to be a pediatrician. Beginning about a monts ago, Raman noticed that he was waking up once, sometimes twice a night, by the need to go to the bathroom. More recently, he has noticed that the needs to go th the bathroom during his school day much none frequently than before, sometimes as often as once every hour. His blood sugar is found to be normal. The most probable cause is
Apomixis in plant is a type of asexual reproduction in which seed formation occurs without sexual union adventitive embrony is a type of apomixis in which
I. somatic cells of ovule directly developed into embryo
II. Somatic cells of ovule developed into embryo through embryo sac
III. Cells of ovary wall directly developed into embryo
IV. The reduced egg directly developed into embryo with fusion with sperm
With reference to Griffith experiment complete the following. virulent S-cells + Live mice Mice died Virulent S-cells Non-virulent + Live mice Mice No bacteria Heat killed S-cells + Live mice Mice Lives No bacteria
Fill in the blanks from the given options ................... and Iron Deficiency Anapmia (IDA) are characterised by microcytic hypochromic anaemias, IDA is easily corrected with iron supplementation, but iron supplementation dose not correct the anapmia due to
Humans are unable to synthesise essential amino acid but they can synthesise non-essential amino acid by their own. Due to this reason essential amino acid has to be taken through food. From the following options, identify the non-essential amino acid
Statement I Garner and Allard observed that Maryland mammoth variety of tobacco could be made to flower only by reducing the light hours with artificial darkening.
Statement II Senescence is an active development cellular process in the growth and functioning of a flowering plant and indicated leaf by abscission.
Rosette is a condition when the leaves of the plants radiate outwards from a short stem at soil level, e.g., cabbage The rosette habit of cabbage can be changed by application of
Sperm and avum are gametes of human. To perform their function smoothly some of their organelles are either modified or assent. Identify the organelle from the option which is absent in them.
The term micronutrient refers to the relative. Quantity of a nutrient that is required for plant growth lesser amount. Which one of the following element is not an essential micronutrient for plant growth?
The citric acid cycle, also known as TCA cycle, lies at the heart of aerobic metabolism. It is involved in the breakdown of all three major food groups arbohydrate, lipids and proteins. In eukaryotes this cycle operates in
Deciduous biomes are located primarly in eastern half of the United states Canada, Europe, parts of Russia, China and Japan. Which of the following is true for the amount of rainfall in these forest
Read carefully the following statements and choose the correct option given below. Statement I 3-Phosphoglyceraldehyde is a product of dark reaction, which is formed by the 1, 3-biphosphoglyceric acid react with 12 mols of NADP, 2H. Statement II Calvin cycle occurs in the granum of chloroplasts where the product of light reaction are used to form \[C{{O}_{2}}\] to carbohydrates and it has enzymes essential for fixation of \[C{{O}_{2}}\] and synthesis of sugar.
Assertion [A] CAM plants lack structural compartmentation of leaf, as found in \[{{C}_{4}}-plants\]. Reason [R] Stomata of CAM plants are open at night and closed during the day.
A)
Both A and R are true and R is the correct explanation of A
doneclear
B)
Both A and R are true, but R is not the correct explanation of A