AIPMT 2010 Prelims

Given are cyclohexanol (I), acetic acid (II), 2, 4, 6-trinitrophenol (III) and phenol (IV). In these the order of decreasing acidic character will be

Which of the following compounds has the most acidic nature?

Which of the following reactions will not result in the formation of carbon-carbon bonds?

Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is

Which one of the following does not exhibit the phenomenon of mutaroation?

In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three ?

Which one of the following species does not exist under normal conditions?

In which of the following pairs of molecules/ ions, the central atoms have sp2 hybridisation ?

In which of the following equilibrium Kc and Kp are not equal?

For the reaction N2O5(g) \(\to\)  2NO2(g) + 1/2O2(g) the value of rate of disappearance of N2O5 is given as 6.25 \(\times\) 10\(-\)3 mol L\(-\)1 s\(-\)1. The rate of formation of NO2 and O2 is given respectively as

During the kinetic study of the reaction, 2A + B \(\to\) C + D, following results were obtained

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Which one of the following is employed as a tranquilizer drug?

Which one of the following complexes is not expected to exhibit isomerism?

The existance of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to

Crystal field stabilization energy for high spin d4 octahedral complex is

Which of the following complex ions is not expected to absorb visible light?

Which of the following ions has electronic configuration [Ar]3d6?
(At. nos. Mn = 25, Fe = 26, Co = 27, Ni = 28)

Which of the following pairs has the same size?

Which of the following ions will exhibit colour in aqueous solutions?

For the reduction of silver ions with copper metal, the standard cell potential was found to be + 0.46 V at 25oC. The value of standard Gibb's energy, \(\Delta\)Go will be
(F = 96500 C mol\(-\)1)

An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

Which one is most reactive towards SN1 reaction?

The correct order of increasing reactivity of

C\(-\)X bond towards nucleophile in the following compounds is

In a set of reactions, ethylbenzene yielded a product D.

D would be

Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by

The reaction of toluene with Cl2 in presence of FeCl3 gives X and reaction in presence of light gives Y. Thus, X and Y are

If pH of a saturated solution of Ba(OH)2 is 12, the value of its Ksp is

In a buffer solution containing equal concentration of B\(-\) and HB, the Kb for B\(-\) is 10\(-\)10. The pH of buffer solution is

What is [H+] in mol/L of a solution that is 0.20 M in CH3COONa and 0.10 M in CH3COOH? Ka for CH3COOH = 1.8 \(\times\) 10\(-\)5

Which of the following statements about primary amines is false?

Aniline in a set of the following reactions yielded a coloured product Y.

The structure of 'Y' would be

Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine?

Oxidation states of P in H4P2O5, H4P2O6, H4P2O7 are respectively

The correct order of increasing bond angles in the following species is

The tendency of BF3, BCl3 and BBr3 to behave as Lewis acid decreases in the sequence

Which one of the following molecular hydrides acts as a Lewis acid?

Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and C\(l\) ?

The correct order of the decreasing ionic radii among the following isoelectronic species is

Which of the following structures represents neoprene polymer?

Which one of the following compounds is a peroxide?

Property of the alkaline earth metals that increases with their atomic number

Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy?

AB crystallizes in a body centered cubic lattice with edge length '\(a\)' equal to 387 pm. The distance between two oppositely charged ions in the lattice is

A solution of sucrose (molar mass = 342 g mol\(-\)) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be (Kf for water = 1.86 K kg mol\(-\)1)

An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?

25.3 g of sodium carbonate, Na2CO3 is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, Na+ and carbonate ions, CO\({}_3^{2 - }\) are respectively (Molar mas...

The number of atoms in 0.1 mol of a triatomic gas is (NA = 6.02 \(\times\) 1023 mol\(-\)1)

Which one of the following is most reactive towards electrophilic reagent?

In the following the most stable conformation of n-butane is

Standard entropies of X2, Y2 and XY3 are 60, 40 and 50 J K\(-\)1 mol\(-\)1 respectively. For the reaction
1/2X2 + 3/2Y2 \(\rightleftharpoons\) XY3, \(\Delta\)H = \(-\) 30 kJ,
to be at equilibrium, the temperature should be