Welcome to your P & C of OC -3
1.
To break ethanol–water azeotrope, the added liquid must have
2.
Partition chromatography involves
3.
Strong adsorption leads to
4.
Two compounds having same Rf value indicate
5.
Increasing solvent polarity in chromatography causes Rf to
6.
Steam distillation is ineffective if compound is
7.
Which is NOT a mobile phase?
8.
Which adsorbent is commonly used in chromatography?
9.
Which method is best to separate mixture of dyes?
10.
TLC plate is visualized using
11.
Steam distillation is suitable for compounds that are
12.
In adsorption chromatography, stationary phase is
13.
Steam distillation is based on the principle that total vapour pressure is
14.
Mobile phase in column chromatography is
15.
Which mixture cannot be separated by fractional distillation?
16.
Azeotropic mixture distils
17.
Chromatography fails if components have
18.
Vacuum distillation is used when a compound
19.
Glycerol is purified by vacuum distillation because
20.
Chromatography is especially useful when substance is
21.
In steam distillation, mixture boils when
22.
More volatile liquid distils
23.
Strongly adsorbed component moves
24.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
25.
TLC is mainly used for purification
26.
Paper chromatography is used to separate
27.
Fractional distillation involves
28.
TLC is superior to paper chromatography because
29.
Which compound cannot be purified by steam distillation?
30.
Which pair is best separated by fractional distillation?
31.
Best method to identify unknown organic compound among many
32.
Function of fractionating column is to increase
33.
Vacuum distillation is also known as
35.
Steam distillation prevents decomposition because
36.
Vacuum distillation lowers BP by
37.
Fractional distillation of crude oil gives
38.
In chromatography, separation is based on difference in
39.
Rf value is independent of
40.
Fractional distillation is preferred over simple distillation when boiling point difference is
41.
Thin layer chromatography stationary phase is usually
42.
Paper chromatography is an example of
43.
Chromatography was introduced by
44.
In paper chromatography, stationary phase is
