Welcome to your P & C of OC -3
1.
Steam distillation prevents decomposition because
2.
Chromatography was introduced by
3.
Vacuum distillation is used when a compound
4.
Which is NOT a mobile phase?
5.
Which method is best to separate mixture of dyes?
6.
Steam distillation is ineffective if compound is
7.
TLC is mainly used for purification
8.
Paper chromatography is an example of
9.
Strongly adsorbed component moves
10.
Strong adsorption leads to
11.
Vacuum distillation lowers BP by
12.
Glycerol is purified by vacuum distillation because
13.
TLC is superior to paper chromatography because
14.
Azeotropic mixture distils
15.
Which compound cannot be purified by steam distillation?
17.
Partition chromatography involves
18.
To break ethanol–water azeotrope, the added liquid must have
19.
Fractional distillation involves
20.
Vacuum distillation is also known as
21.
Paper chromatography is used to separate
22.
TLC plate is visualized using
23.
Fractional distillation of crude oil gives
24.
Steam distillation is suitable for compounds that are
25.
Which mixture cannot be separated by fractional distillation?
26.
In steam distillation, mixture boils when
27.
In chromatography, separation is based on difference in
28.
More volatile liquid distils
30.
Two compounds having same Rf value indicate
31.
Fractional distillation is preferred over simple distillation when boiling point difference is
32.
In adsorption chromatography, stationary phase is
33.
Function of fractionating column is to increase
34.
Which pair is best separated by fractional distillation?
35.
Which adsorbent is commonly used in chromatography?
36.
Mobile phase in column chromatography is
37.
In paper chromatography, stationary phase is
38.
Best method to identify unknown organic compound among many
39.
Steam distillation is based on the principle that total vapour pressure is
40.
Thin layer chromatography stationary phase is usually
41.
Rf value is independent of
42.
Increasing solvent polarity in chromatography causes Rf to
43.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
44.
Chromatography fails if components have
45.
Chromatography is especially useful when substance is
