Q.1 Science of the chemical characterization is stand under
the heading of
(a) industrial chemistry (b) experimental chemistry
(c) analytical chemistry (d) physical chemistry
Q.2 Several types of filter media are used for filtration
depending on
(a) nature of reaction (b) nature of reactants
(c) nature of precipitate (d) nature of filter paper
Q.3 Filtration by a glass funnel and filter paper is very
(a) time consuming (b) difficult
(c) fast (d) accurate
EXPERIMENTAL TECHNIQUES IN CHEMISTRY MCQs
Q.4 Date of filtration through conical funnel can be
considerably increased by using
(a) fine filter paper (b) ordinary filter paper
(c) fluted filter (d) under suction crucible
Q.5 Gooch crucible is used to filter the solution of
(a) K2Cr2O7 (b) KMnO4
(c) KOH (d) under suction crucible
Q.6 Basic principles of crystallization is that solute
should be soluble in a suitable solution at
(a) freezing temperature (b) room temperature
(c) high temperature (d) low temperature
Q.7 Premature crystallization of solution of filter paper or
in funnel can be avoided
(a) filtering
hot saturated solution using hot funnel
(b) filling
warm solution
(c) quick
filtration
(d) filtering
cold solution
Q.8 Safe and reliable method of drying crystal in through
(a) pressing
it between folds of filter paper
(b) drying
it in oven
(c) evaporation
of solution
(d) vacuum
desiccator
Q.9 In solvent
extraction solute can be separated from solution by shaking the solution with
solvent which the solute is
(a) more soluble (b) partially soluble
(c) insoluble (d) soluble at high temperature
Q.10 Repeated extraction using small portions of solvent are
more
(a) accurate (b) efficient
(c) slow (d) rapid
Q.11 To achieve a good separation the two liquids are gently
shaken to increase their area of
(a) miscibility (b) separation
(c) contact (d) solubility
Q.12 Chromatography in which stationary phase is solid is
called
(a) partition
chromatography
(b) paper
chromatography
(c) high
pressure
(d) adsorption
chromatography
Q.13 Chromatography involves these distribution of a
solution between
(a) two
stationary phase
(b) two
mobile phase
(c) a
stationary phase and a mobile phase
(d) two
stationary and two mobile phase
Q.14 Chromatography in which the stationary phase is liquid
is called
(a) partition
chromatography
(b) descending
chromatography
(c) column
chromatography
(d) Adsorption
chromatography
Q.15 In paper chromatography the rate at which solutes move
depends on
(a) distribution law (b) distribution coefficients
(c) law of partial pressure (d) law of specific proportion
Q.16 Solvent extraction is an equilibrium process and it is
controlled by
(a) law of mass action (b) the amount of solvent used
(c) distribution law (d) the amount of solute
Q.17 The comparative rates at which the solutes move in
paper chromatography depend on
(a) the
size of paper used
(b) Rf
values of solutes
(c) temperature
of the experiment
(d) size
of the chromatographic tank used
Q.18 A filtration process could be very time consuming if it
were not aided by the gentle suction, which is
developed
(a) if
the paper covers the funnel up to its circumference
(b) if
the paper has got small sized pores in it
(c) if
the stem of the funnel is large so that it dips into the filtrate
(d) if
the paper fits tightly
Q.19 Solvent extraction method is particularly useful
technique for separation, when product to be separated is
(a) non–volatile
or thermally unstable
(b) volatile
or thermally stable
(c) non
volatile or thermally stable
(d) non–volatile
or thermally unstable
Q.20 During the process of crystallization, the hot
saturated solution
(a) is
cooled very slowly to get large sized crystals
(b) is
cooled at a moderate rate to get medium sized crystals
(c) is
evaporated to get the pure crystals of the product
(d) is
mixed with an immiscible liquid, to get the pure crystals of the product
Q.21 Aqueous solution of iodine is prepared first by
dissolving which compound in water
(a) KBr (b) KI
(c) KCl (d) NaCl
Q.22 The meaning of chromatos
(a) colour writing (b) colour writing
(c) colour forming (d) colour spreading
Q.23 Which is not common way of carrying chromatography
(a) ascending (b) descending
(c) radial/circular (d) spreading irregularly
Q.24 In paper chromatography the stationary phase is
(a) water (b) organic liquid
(c) inorganic liquid (d) none of the above
Q.25 In paper chromatography the mobile phase is
(a) organic liquid (b) water
(c)
inorganic liquid (d) none of the above
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