The electronic configurations of Eu(Atomic No 63),
Gd(Atomic No 64) and Tb (Atomic No. 65) are
(1) [Xe]``4f^76s^2``, [Xe]``4f^8 6s^2`` and [Xe]``4f^85d^16s^2``
(2) [Xe]``4f^75d^16s^2``, [Xe]``4f^7 5d^1 6s^2`` and [Xe]``4f^96s^2``
(3) [Xe]``4f^65d^16s^2``, [Xe]``4f^75d^16s^2`` and [Xe]``4f^85d^16s^2``
(4) [Xe]``4f^76s^2``, [Xe]``4f^75d^16s^2 ``and [Xe]``4f^96s^2``

Two electrons occupying the same orbital are
distinguished by
(1) Principal quantum number
(2) Magnetic quantum number
(3) Azimuthal quantum number
(4) Spin quantum number

Which copper is heated with conc. ``HNO_3`` it
produces
(1) ``Cu(NO_3)_2`` and ``NO_2``
(2) ``Cu(NO_3)_2`` and NO
(3) ``Cu(NO_3)_2``, NO and ``NO_2``
(4) ``Cu(NO_3)_2`` and ``N_2O``

Which of the following reagents would distingusih
cis-cyclopenta-1,2-diol from the trans-isomer?
(1) Acetone
(2) Ozone
(3) MnO2
(4) Aluminium isopropxide

The correct thermodynamic conditions for the
spontaneous reaction at all temperatures is
(1)``\triangle``H < 0 and ``\triangle``S = 0
(2) ``\triangle``H > 0 and ``\triangle``S < 0
(3) ``\triangle``H < 0 and ``\triangle``S > 0
(4)``\triangle``H < 0 and ``\triangle``S < 0

Lithium has a bcc structure. Its density is
530 ``kg m^{-3}`` and its atomic mass is 6.94 ``g mol^{-1}``.
Calculate the edge length of a unit cell of Lithium
metal. (NA = 6.02 × ``10^{23} mol^{-1}``)
(1) 154 pm
(2) 352 pm
(3) 527 pm
(4) 264 pm

Which one of the following orders is correct for the
bond dissociation enthalpy of halogen molecules?
(1) ``\ce {I2 > Br2 > Cl2 > F2}``
(2) ``\ce {Cl2 > Br2 > F2 > I2}``
(3) ``\ce Br2 > I2 > F2 > Cl2}``
(4)``\ce { F2 > Cl2 > Br2 > I2}``

Which of the following is an analgesic ?
(1) Novalgin
(2) Penicillin
(3) Streptomycin
(4) Chloromycetin

Equal moles of hydrogen and oxygen gases are
placed in a container with a pin-hole through which
both can escape. What fraction of the oxygen
escapes in the time required for one-half of the
hydrogen to escape ?
(1) 1/8
(2) 1/4
(3) 3/8
(4) 1/2

Consider the nitration of benzene using mixed conc.
``H_2SO_4`` and ``HNO_3``. If a large amount of ``KHSO_4`` is
added to the mixture, the rate of nitration will be:-
(1) faster
(2) slower
(3) unchanged
(4) doubled

Predict the correct order among the following :-
(1) lone pair- lone pair > lone pair - bond pair
> bond pair - bond pair
(2) lone pair - lone pair > bond pair - bond pair
> lone pair - bond pair
(3) bond pair - bond pair > lone pair - bond pair
> lone pair - lone pair
(4) lone pair - bond pair > bond pair - bond pair
> lone pair - lone pair

The product obtained as a result of a reaction of
nitrogen with ``CaC_2`` is :-
(1) ``Ca(CN)_2``
(2) CaCN
(3)`` CaCN_3``
(4)`` Ca_2CN``

Consider the following liquid - vapour equilibrium.
Liquid ``\rightleftharpoons`` Vapour
Which of the following relations is correct ?
(1) ``\frac {dlnG}{dT^2}``=``\frac {\triangle H_v}{RT^2}``
(2)``\frac {dlnP}{dT}``=``\frac {-\triangle H_v}{RT}``
(3)``\frac {dlnP}{dT^2}``=``\frac {-\triangle H_v}{T^2}``
(4) ``\frac {dlnP}{dT}``=``\frac {\triangle H_v}{RT^2}``

Match the compounds given in column I with the
hybridisation and shape given in column II and mark
the correct option.
Column-I Column-II
a) ``XeF_6`` (i) Distorted
octahedral
(b) ``XeO_3`` (ii) Square planar
(c) ``XeOF_4`` (iii) pyramidal
(d) ``XeF_4`` (iv) Square
pyramidal
Code :-
a) (b) (c) (d)
(1) (i) (iii) (iv) (ii)
(2) (i) (ii) (iv) (iii)
(3) (iv) (iii) (i) (ii)
(4) (iv) (i) (ii) (iii)

Which of the following has longest C-O bond
length? (Free C-O bond length in Co is 1.128Å).
(1) ``Ni(CO)_4``
(2) ``[Co(CO)_4]^\circleddash ``
(3) ``[Fe(CO)_4]^{2-}``
(4) ``[Mn(CO)_6]^+``