The freezing point depression constant (K
f) of benzene is 5.12 K kg mol-1. The freezing point
depression for the solution of molality 0.078 m
containing a non-electrolyte solute in benzene is
(rounded off upto two decimal places) :
(1) 0.20 K
(2) 0.80 K
(3) 0.40 K
(4) 0.60 K

The number of Faradays(F) required to produce
20 g of calcium from molten ``\ce{CaCl2}`` (Atomic mass
of Ca=40 g mol-1) is :
(1) 1
(2) 2
(3) 3
(4) 4

Reaction between benzaldehyde and acetophenone
in presence of dilute NaOH is known as :
(1) Aldol condensation
(2) Cannizzaro’s reaction
(3) Cross Cannizzaro’s reaction
(4) Cross Aldol condensation

Paper chromatography is an example of :
(1) Adsorption chromatography
(2) Partition chromatography
(3) Thin layer chromatography
(4) Column chromatography

An increase in the concentration of the reactants
of a reaction leads to change in :
(1) activation energy
(2) heat of reaction
(3) threshold energy
(4) collision frequency

A mixture of ``\ce{N2}`` and Ar gases in a cylinder contains
7 g of ``\ce{N2}`` and 8 g of Ar. If the total pressure of the
mixture of the gases in the cylinder is 27 bar, the
partial pressure of ``\ce{N2}`` is :
[Use atomic masses (in g mol-1) : N=14, Ar=40]
(1) 9 bar
(2) 12 bar
(3) 15 bar
(4) 18 bar

Identify the correct statement from the
following :
(1) Wrought iron is impure iron with
4% carbon.
(2) Blister copper has blistered appearance due
to evolution of ``\ce{C``\ce{``\ce{O2}``}``}``
(3) Vapour phase refining is carried out for
Nickel by Van Arkel method.
(4) Pig iron can be moulded into a variety of
shapes.

A tertiary butyl carbocation is more stable than a
secondary butyl carbocation because of which of
the following ?
(1) -I effect of ``\ce{-CH3}``
groups
(2) +R effect of ``\ce{-CH3}``
groups
(3) -R effect of ``\ce{-CH3}``
groups
(4) Hyperconjugation

Which of the following is a cationic detergent ?
(1) Sodium lauryl sulphate
(2) Sodium stearate
(3) Cetyltrimethyl ammonium bromide
(4) Sodium dodecylbenzene sulphonate

Elimination reaction of 2-Bromo-pentane to form
pent-2-ene is :
-(a) β-Elimination reaction
(b) Follows Zaitsev rule
(c) Dehydrohalogenation reaction
(d) Dehydration reaction
(1) -(a), (b), (c)
(2) -(a), (c), (d)
(3) (b), (c), (d)
(4) -(a), (b), (d)

The mixture which shows positive deviation from
Raoult’s law is :
(1) Ethanol+Acetone
(2) Benzene+Toluene
(3) Acetone+Chloroform
(4) Chloroethane+Bromoethane

Which of the following is the correct order of
increasing field strength of ligands to form
coordination compounds ?
(1) ``\ce{SCN < F- < C2O4^{2-} < CN-}``
(2) ``\ce{SCN < F- < CN- < C2O4^{2-}}``
(3) ``\ce{F-< SCN- < C2O4^{2-}} < CN-``
(4)``\ce{CN- < C2O4^{2-} < SCN- < F-}``

Which of the following is a basic amino acid ?
(1) Serine
(2) Alanine
(3) Tyrosine
(4) Lysine

HCl was passed through a solution of ``\ce{CaCl2} , \ce{MgCl2} ``
and NaCl. Which of the following compound(s)
crystallise(s) ?
(1) Both ``\ce{MgCl2}`` and ``\ce{CaCl2}``
(2) Only ``\ce{NaCl}``
(3) Only ``\ce{MgCl2}``
(4) NaCl, ``\ce{MgCl2}`` and ``\ce{CaCl2}``

Which of the following is a natural polymer ?
(1) cis-1,4-polyisoprene
(2) poly (Butadiene-styrene)
(3) polybutadiene
(4) poly (Butadiene-acrylonitrile)