The correct corresponding order names of four
aldoses with configuration given below

respectively, is :-
(1) L-erythrose, L-threose, D-erythrose, D-threose
(2) D-erythrose, D-threose, L-erythrose, L-threose
(3) L-erythrose, L-threose, L-erythrose, D-threose
(4) D-threose, D-erythrose, L-threose, L-erythrose

In the given reaction

the product P is :-
(1)
(2)
(3)
(4)

A given nitrogen-containing aromatic compound A
reacts with Sn/HCl, followed by ``HNO_2`` to give an
unstable compound B. B, on treatment with phenol,
forms a beatiful coloured compound C with the
molecular formula ``C_{12}H_{10}N_2O``.
The structure of compound A is :-
(1)
(2)
(3)
(4)

Consider the reaction
``\ce {CH3CH2CH2Br + NaCN \rightarrow CH3CH2CH2CN + NaBr}``
This reaction will be the fastest in
(1) N,N'-dimethylformamide (DMF)
(2) water
(3) ethanol
(4) methanol

The correct structure of the product A formed in
the reaction

(1)
(2)
(3)
(4)

Which among the given molecules can exhibit
tautomerism ?

(1) Both I and II
(2) Both II and III
(3) III only
(4) Both I and III

The correct order of strengths of the carboxylic acids

is
(1) III > II > I
(2) II > I > III
(3) I > II > III
(4) II > III > I

The compound that will react most readily with
gaseous bromine has the formula
(1) ``C_4H_{10}``
(2) ``C_2H_4``
(3) ``C_3H_6``
(4) ``C_2H_2``

Which one of the following compounds shows the
presence of intramolecular hydrogen bond ?
(1) Cellulose
(2) Concentrated acetic acid
(3) ``H_2O_2``
(4) HCN

The molar conductivity of a 0.5 mol/``dm^3``
solution of ``AgNO_3`` with electrolytic conductivity of
5.76 × ``10^{-3} S cm^{-1}`` at 298 K is
(1) 0.086 S ``cm^2/mol``
(2) 28.8 S ``cm^2/mol``
(3) 2.88 S ``cm^2/mol``
(4) 11.52 S ``cm^2/mol``

The decomposition of phosphine (``PH_3``) on tungsten
at low pressure is a first-order reaction. It is because
the
(1) rate is independent of the surface coverage
(2) rate of decomposition is very slow
(3) rate is proportional to the surface coverage
(4) rate is inversely proportional to the surface
coverage

The coagulation values in millimoles per litre of the
electrolytes used for the coagulation of ``As_2S_3`` are
given below :
I. (NaCl) = 52, II. (``BaCl_2``) = 0.69,
III. (``MgSO_4``) = 0.22
The correct order of their coagulating power is
(1) III > II > I
(2) III > I > II
(3) I > II > III
(4) II > I > III

During the electrolysis of molten sodium chloride,
the time required to produce 0.10 mol of chlorine
gas using a current of 3 amperes is
(1) 220 minutes
(2) 330 minutes
(3) 55 minutes
(4) 110 minutes

How many electrons can fit in the orbital for which
n = 3 and l = 1 ?
(1) 10
(2) 14
(3) 2
(4) 6

For a sample of perfect gas when its pressure is
changed isothermally from ``p_i`` to ``p_f``, the
entropy change is given by
(1)``\triangle S`` = nRT `` ln \frac {p_f}{p_i}``
(2)``\triangle S`` = RT `` ln \frac {p_i}{p_f}``
(3)``\triangle S`` = nR `` ln \frac {p_f}{p_i}``
(4)``\triangle S`` = nR `` ln \frac {p_i}{p_f}``