The most suitable method of separation of
1 : 1 mixture of ortho and para-nitrophenols is :
(1) Steam distillation
(2) Sublimation
(3) Chromatography
(4) Crystallisation

Which of the following statements is
not correct?
(1) Denaturation makes the proteins more active.
(2) Insulin maintains sugar level in the blood of a human body.
(3) Ovalbumin is a simple food reserve in egg-white.
(4) Blood proteins thrombin and fibrinogen are involved in blood clotting.

Of the following, which is the product
formed when cyclohexanone undergoes aldol
condensation followed by heating?
(1)
(2)
(3)
(4)

The heating of phenyl-methyl ethers
with HI produces.
(1) benzene
(2) ethyl chlorides
(3) iodobenzene
(4) phenol

The correct increasing order of basic
strength for the following compounds is :



(1) II < I < III
(2) II < III < I
(3) III < I < II
(4) III < II < I

Which one of the following pairs of
species have the same bond order?
(1) ``N_2``, ``O_2^{-}``
(2) CO, NO
(3)`` O_2``, NO
(4) ``CN^-, CO

Name the gas that can readily
decolourise acidified KMnO4 solution :
(1) ``P_2O_5 ``
(2) ``CO_2``
(3) ``SO_2``
(4) ``NO_2``

The reason for greater range of oxidation
states in actinoids is attributed to :
(1) 4f and 5d levels being close in energies
(2) the radioactive nature of actinoids
(3) actinoid contraction
(4) 5f, 6d and 7s levels having comparable energies

Concentration of the ``Ag^+`` ions in a saturated
solution of ``Ag_2C_2O_4`` is 2.2 × ``10^{-4}`` mol ``L^{-1}``.
Solubility product of ``Ag_2C_2O_4`` is :
(1) 5.3 × ``10^{-12}``
(2) 2.42 × ``10^{-8}``
(3) 2.66 × ``10^{-12}``
(4) 4.5 × ``10^{-11}``

With respect to the conformers of ethane,
which of the following statements is true?
(1) Both bond angles and bond length remains same
(2) Bond angle remains same but bond length changes
(3) Bond angle changes but bond length remains same
(4) Both bond angle and bond length change

Identify A and predict the type of reaction-

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

Which of the following is sink for CO?
(1) Plants
(2) Haemoglobin
(3) Micro organisms present in the soil
(4) Oceans

In which pair of ions both the species
contain S - S bond?
(1) ``S_4O_6^{2-}`` , ``S_2O_7^{2-}``
(2)``S_2O_7^{2-}`` , ``S_2O_3^{2-}``
(3)``S_4O_6^{2-}`` , ``S_2O_3^{2-}``
(4)``S_2O_7^{2-}`` , ``S_2O_8^{2-}``

Pick out the correct statement with respect to ``[Mn(CN)_6]^{3-}`` :
(1) It is ``dsp^2`` hybridised and square planar
(2) It is ``sp^3d^2`` hybridised and octahedral
(3) It is ``sp^3d^2`` hybridised and tetrahedral
(4) It is ``d^2sp^3`` hybridised and octahedral

The equilibrium constants of the following are :
``\ce [N2 +3H2 \rightleftarrows 2NH3``]
``\ce [N2 + O2 \rightleftarrows 2NO``]
``\ce [H2 + \frac12 O2 \rightleftarrows H2O``]
The equilibrium constant (K) of the reaction :
``\ce 2NH_3 + \frac52 O_2`` ``\xrightleftharpoons{K}`` ``2NO + 3H_2O``
, will be:
(1) ``K_2^3`` ``K_3/ K_1``
(2)``K_1`` ``K_3^3``/``K_2``
(3) ``K_2`` ``K_3^3``/``K_1``
(4) ``K_2`` ``K_3``/``K_1``