EXPERIMENTAL TECHNIQUES IN CHEMISTRY MCQs
Chapter
No. 2
EXPERIMENTAL TECHNIQUES IN CHEMISTRY
MCQs
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
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
ANSWER
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