Experimental Techniques in Chemistry - 5
1.
Filtration by a glass funnel and filter paper is very.
a) Time consuming
b) Accurate
c) Fast
d) Difficult
2.
Rate of filtration through conical funnel can be considerably increased by using
a) Under suction crucible.
b) Ordinary filter paper
c) Fine filter paper
d) Fluted filter paper
3.
Gooch crucible is used to filter the solution of
a) KOH
b) K
2
SO
4
c) KMnO
4
d) K
2
Cr
2
O
7
4.
Basic principle of crystallization is that solute should be soluble in a suitable solvent at.
a) High temperature
b) Freezing temperature.
c) Low temperature.
d) Room Temperature
5.
Premature crystallization of solute on filter paper or in funnel can be avoided.
a) Filtering cold solution.
b) Quick filtration
c) Filtering hot saturated solution using hot funnal
d) Filtering warm solution
6.
Safe and reliable method of drying crystals is through.
a) Evaporation of solution
b) Pressing it between folds of filter paper
c) Vacuum desiccator.
d) Drying it in oven.
7.
In solvent extraction solute can be separated from solution by shaking the solution with solvent in which the solute is.
a) Insoluble
b) Soluble at high temperature.
c) Partially soluble
d) More soluble
8.
Repeated extraction using small portions of solvent are more.
a) Rapid
b) Accurate.
c) Efficient
d) Slow
9.
To achieve a good separation, the two liquids are gently shaken to increase their area of
a) Contact
b) Solubility
c) Separation.
d) Miscibility
10.
Chromatography involves the distribution of a solute between.
a) A stationary phase and a mobile phase
b) Two mobile phase
c) Two stationary and two mobile phase.
d) Two stationary phase
11.
Chromatography in which stationary phase is a solid is called.
a) Partition chromatography
b) Paper chromatography
c) High pressure
d) Adsorption chromatography
12.
Chromatography in which stationary phase is a liquid is called.
a) Column chromatography
b) Descending chromatography
c) Partition chromatography
d) Adsorption chromatography
13.
In paper chromatography the rate at which solute move depend on.
a) Distribution co-efficients
b) Law of specific propostion.
c) Distribution law
d) Law of partial pressure
14.
Analytical chemistry is normally considered the science of ________.
a) Compounds
b) Chemical characteriztion.
c) Crystallization
d) Chromatography
15.
In qualitative analysis, a chemist is concerned with the detection or identification of the _________ present in a _________.
a) Elements ii. Compounds
b) Filter paper ii. Filter crucible
c) Gas ii. Liquid
d) CaCl
2
ii. Silca gel
This is more feedback!
This is the feedback!
