AIPMT 2007

In the reaction :

Which of the following compounds will be formed?

The product formed in Aldol condensation is

Which one of the following on treatment with 50% aqueous sodium hydroxide yields the corresponding alcohol and acid?

Consider the following compounds

The correct decreasing order of their reactivity towards hydrolysis is

Reduction of aldehydes and ketones into hydrocarbons using zinc amalgam and conc. HCl is called

Which of the following represents the correct order of the acidity in the given compounds ?

RNA and DNA are chiral molecules, their chirality is due to

Which of the following vitamins is water-soluble?

In which of the following pairs, the two species are isostructural?

The correct order of C \(-\) O bond length among CO, CO\({_3^{2 - }}\), CO2 is

The equilibrium constants of the following are
N2 + 3H2 \(\rightleftharpoons\) 2NH3;     K1
N2 + O2 \(\rightleftharpoons\) 2NO;     K2
H2 + \({1 \over 2}\)O2 \(\rightleftharpoons\)
H2O;     K3
The equilibrium constant (K) of the rea...

The reaction of hydrogen and iodine monochloride is given as :
H2(g) + 2ICl(g) \(\to\) 2HCl(g) + I2(g)
This reaction is of first order with respect to H2(g) and ICl(g),
following mechanisms were proposed.
Mechanism A :
     H2(g) + 2ICl(...

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately
(log 4 = 0.60, log 5 = 0.69)

In a first-order reaction A \(\to\) B, if k is rate constant and initial concentration of the reactant A is 0.5 M, then the half-life is

The d electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?
(At. No. Cr = 24, Mn = 25, Fe = 26, Ni = 28)

Which of the following will give a pair of enantiomorphs?
(en = NH2CH2CH2NH2)

Which one of the following ions is the most stable in aqueous solution?
(At. No. Ti = 22, V = 23, Cr = 24, Mn = 25)

Identify the incorrect statement among the following:

The equilibrium constant of the reaction:
Cu(s) + 2Ag+(aq) \(\to\) Cu2+(aq) + 2Ag(s);
Eo = 0.46 V at 298 K is

The efficiency of a fuel cell is given by

CH3 \(-\) CHCl \(-\) CH2 \(-\) CH3 has a chiral centre. Which one of the following represents its R-configuration?

Which of the compound with molecular formula C5H10 yields acetone on ozonolysis?

Predict the product C obtained in the following reaction of 1-butyne.

A weak acid, HA, has a Ka of 1.00 \(\times\) 10\(-\)5. If 0.100 mol of this acid is dissolved in one litre of water, the percentage of acid dissociated at equilibrium is closest to

Calculate the pOH of a solution at 25oC that contains 1 \(\times\) 10\(-\)10 M of hydronium ions, i.e. H3O+.

Which one of the following on reduction with lithium aluminium hydride yields a secondary amine?

Which of the following oxidation states are the most characteristic for lead and tin respectively?

Which one of the following orders correctly represents the increasing acid strengths of the given acids?

Which of the following anions is present in the chain structure of silicates?

With which of the following electronic configuration an atom has the lowest ionisation enthalpy ?

Which one of the following ionic species has the greatest proton affinity to form stable compound ?

Identify the correct order of the size of the following :

Which one of the following polymers is prepared by condensation polymerisation?

Which of the following statements, about the advantage of roasting of sulphide ore before reduction is not true?

Sulphide ores of metals are usually concentrated by froth floatation process. Which one of the following sulphide ores offer an exception and is concentrated by chemical leaching?

In which of the following the hydration energy is higher than the lattice energy?

The correct order of increasing thermal stability of K2CO3, MgCO3, CaCO3 and BeCO3 is

If NaCl is doped with 10\(-\)4 mol% of SrCl2, the concentration of cation vacancies will be (NA = 6.02 \(\times\) 1023 mol\(-\)1)

The fraction of total volume occupied by the atoms present in a simple cube is

0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol\(-\)1, the lowering in freezing point of the solution is

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL\(-\)1. Volume of acid required to make one litre of 0.1 M H2SO4 solution is

An element, X has the following isotopic composition:
200X : 90%  199X : 8.0%  202X : 2.0%
The weighted average atomic mass of the naturally occuring element X is closest to

The order of decreasing reactivity towards an electrophilic reagent, for the following would be
(i) benzene
(ii) toluene
(iii) chlorobenzene
(iv) phenol

If there is no rotation of plane polarised light by a compound in a specific solvent, through to be chiral, it may mean than

For (i) I\(-\), (ii) Cl\(-\), (iii) Br\(-\), the increasing order of nucleophilicity would be

Consider the following sets of quantum numbers :

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The Langmuir adsorption isotherm is deduced using the assumption

Consider the following reactions :
(i) H+(aq) + OH\(-\)(aq) = H2O(l),  \(\Delta\)H = \(-\) X1 kJ mol\(-\)1
(ii) H2(g) + 1/2O2(g) = H2O(l),   \(\Delta\)H = \(-\) X2 kJ mol\(-\)1
(iii) CO2(g) + H2(g) = CO(g) + H2O(l),  \(\Delta\)H = $$-$...

Given that bond energies of H \(-\) H and Cl \(-\) Cl are 430 kJ mol\(-\)1 and 240 kJ mol\(-\)1 respectively and \(\Delta\)Hf for HCl is \(-\) 90 kJ mol\(-\)1, bond enthalpy of HCl is