AIPMT 2011 Mains

In mitochondria, protons accumulate in the

What is common between vegetative reproduction and apomixts?

In angiosperms, functional megaspore develops into

The cells lining the blood vessels belongs to the
category of :

Which one of the following structure in pheretima
is correctly matched with its function ?

Frogs differ from humans in possessing :

Which one of the following aspects is in exclusive characteristics of living things?

Guttation is the result of

The order of reactivity of phenyl magnesium bromide (PhMgBr) with the following compounds:

Match the compounds given in List-I with List-II and select the suitable option using the code given below.

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An organic compound A on treatment with NH3 gives B, which on heating gives C. C when treated with Br2 in the presence of KOH produces ethyl amine. Compound A is

Which of the statements about ''Denaturation'' given below are correct?
(1)  Denaturation of proteins causes loss of secondary and tertiary structures of the protein.
(2)  Denaturation leads to the conversion of double strand of DND into s...

Which of the following is not a fat soluble vitamin?

The pairs of species of oxygen and their
magnetic behaviours are noted below. Which of
the following presents the correct description?

Which of the following structures is the most preferred and hence of lowest energy for SO3?

The half-life of a substance in a certain enzyme-catalysed reaction is 138 s. The time required for the concentration of the substance to fall from 1.28 mg L\(-\)1 to 0.04 mg L\(-\)1 is

The unit of rate constant for a zero order reaction is

The rate of the reaction :   2N2O5 \(\to\) 4NO2 + O2
can be written in three ways.
\({{ - d\left[ {{N_2}{O_5}} \right]} \over {dt}} = k\left[ {{N_2}{O_5}} \right]\)
$${{d\left[ {N{O_2}} \right]} \over {dt}} = k'\left[ {{N_2}{O_5}} \right...

Which of the following complex compounds will
exhibit highest paramagnetic behaviour?
(At. No. Ti = 22, Cr = 24, Co = 27, Zn = 30)

Which of the following carbonyls will have the
strongest C–O bond ?

A solution contains Fe2+, Fe3+ and I\(-\) ions. This solution was treated with iodine at 35oC. Eo for Fe3+/Fe2+ is + 0.77 V and Eo for I2/2I\(-\) = 0.536 V.
The favourable redox reaction is

A bubble of air is underwater at temperature 15oC and the pressure 1.5 bar. If the bubble rises to the surface where the temperature is 25oC and the pressure is 1.0 bar, what will happen to the volume of the bubble?

Consider the reactions.

The mechanisms of reactions (i) and (ii) are respectively

Which of the following compounds undergoes nucleophilic substitution reaction most easily?

In qualitative analysis, the metals of group I can be separated from other ions by precipitating them as chloride salts. A solution initially contains Ag+ and pb2+ at a concentration of 0.10 M. Aqueous HCl is added to this solution until t...

What of the following compounds is most basic?

Which of the following oxide is amphoteric?

Which of the following statements is incorrect?

What is the value of electron gain enthalpy of Na+ if IE1 of Na = 5.1 eV?

The following reactions take place in the blast furnace in the preparation of impure iron. Identify the reaction pertaining to the formation of the slag.

Match List-I with List-II for the compositions of substances and select the correct answer using the code given above.

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A solid compound XY has NaCl structure. If the radius of the cation is 100 pm, the radius of the anion (Y\(-\)) will be

200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be 2.57 \(\times\) 10\(-\)3 bar. The molar mass of protein will be (R = 0.083 L bar mol\(-\)1 K\(-\)1)

A 0.1 molal aqueous solution of a weak acid is 30% ionized. If Kf for water is 1.86oC/m, the freezing point of the solution will be

Which has the maximum number of molecules among the following ?

The IUPAC name of the following compound is

According to the Bohr theory, which of the following transitions in the hydrogen atom will give rise to the least energetic photon ?

Consider the following processes :

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....

The r.m.s. value of potential difference V shown in the figure is

A coil has resistance 30 ohm and inductive reactance 20 ohm at 50 Hz frequency. If an ac source, of 200 volt, 100 Hz, is connected across the coil, the current in the coil will be

Out of the following which one is not a possible energy for a photon to be emitted by hydrogen atom according to Bohr's atomic model?

Two radioactive nuclei P and Q, in a given sample decay into a stable nucleus R. At time t = 0. number of P species are 4 N0 and that of Q are N0. Half -life of P (for conversion to R) is 1 minute where as that of Q is 2 minutes. Initially ...

An electron in the hydrogen atom jumps from excited state n to the ground state. The wavelength so emitted illuminates a photosensitive material having work function 2.75 eV. If the stopping potential of the photoelectron is 10 V, then the ...

In the circuit shown in the figure, if the potential at point A is taken to be zero, the potential at point B is

A thermocouple of negligible resistance
produces an e.m.f. of 40 µV/ºC in the linear range
of temperature. A galvanometer of resistance 10
ohm whose sensitivity is 1 µA/division, is
employed with the thermocouple. The smallest
value of temp...

The threshold frequency for a photosensitive metal is 3.3 \(\times\) 1014 Hz. If light of frequency 8.2 \(\times\) 1014 Hz is incident on this metal, the cut- off voltage for the photoelectron emission is nearly

The electric potential V at any point (x, y, z), all in metres in space is given by V = 4x2 volt. The electric field at the point (1, 0, 2) in volt/meter, is

Three charges, each +q, are placed at the corners of an isosceles triangle ABC of sides BC and AC, 2\(a\). D and E are the mid points of BC and CA. The work done in taking a charge Q from D to E is

A thin prism of angle 15o made of glass of refractive index \(\mu\)1 = 1.5 is combined with another prism of glass of refractive index \(\mu\)2 = 1.75. The combination of the prisms produces dispersion without deviation. The angle of the ...

A converging beam of rays is incident on a diverging lens. Having passed through the lens the rays intersect at a point 15 cm from the lens on the opposite side. If the lens is removed the point where the rays meet will move 5 cm closer to ...