Welcome to your P & C of OC -3
1.
Chromatography fails if components have
2.
Which is NOT a mobile phase?
3.
Two compounds having same Rf value indicate
4.
Rf value is independent of
5.
Partition chromatography involves
6.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
7.
Azeotropic mixture distils
8.
Fractional distillation involves
9.
Vacuum distillation is also known as
10.
Steam distillation is suitable for compounds that are
11.
Vacuum distillation is used when a compound
12.
TLC is mainly used for purification
13.
TLC is superior to paper chromatography because
14.
Strong adsorption leads to
15.
Function of fractionating column is to increase
16.
Paper chromatography is an example of
17.
Steam distillation is based on the principle that total vapour pressure is
18.
Best method to identify unknown organic compound among many
19.
In chromatography, separation is based on difference in
20.
In paper chromatography, stationary phase is
21.
Which adsorbent is commonly used in chromatography?
22.
Which compound cannot be purified by steam distillation?
23.
More volatile liquid distils
24.
To break ethanol–water azeotrope, the added liquid must have
25.
Glycerol is purified by vacuum distillation because
26.
Paper chromatography is used to separate
27.
Chromatography is especially useful when substance is
30.
Steam distillation is ineffective if compound is
31.
In steam distillation, mixture boils when
32.
Steam distillation prevents decomposition because
33.
Which mixture cannot be separated by fractional distillation?
34.
Thin layer chromatography stationary phase is usually
35.
Which method is best to separate mixture of dyes?
36.
Fractional distillation of crude oil gives
37.
TLC plate is visualized using
38.
In adsorption chromatography, stationary phase is
39.
Mobile phase in column chromatography is
40.
Increasing solvent polarity in chromatography causes Rf to
41.
Strongly adsorbed component moves
42.
Fractional distillation is preferred over simple distillation when boiling point difference is
43.
Vacuum distillation lowers BP by
44.
Which pair is best separated by fractional distillation?
45.
Chromatography was introduced by
