Welcome to your P & C of OC -3
1.
Function of fractionating column is to increase
2.
TLC plate is visualized using
3.
Two compounds having same Rf value indicate
4.
Paper chromatography is used to separate
5.
Fractional distillation involves
6.
Chromatography is especially useful when substance is
7.
In chromatography, separation is based on difference in
9.
Vacuum distillation is used when a compound
10.
In paper chromatography, stationary phase is
11.
TLC is mainly used for purification
12.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
13.
Best method to identify unknown organic compound among many
14.
To break ethanol–water azeotrope, the added liquid must have
16.
Chromatography fails if components have
17.
Which compound cannot be purified by steam distillation?
18.
Thin layer chromatography stationary phase is usually
19.
More volatile liquid distils
20.
In adsorption chromatography, stationary phase is
21.
Partition chromatography involves
22.
Vacuum distillation is also known as
23.
Which is NOT a mobile phase?
24.
Chromatography was introduced by
25.
Strong adsorption leads to
26.
Which pair is best separated by fractional distillation?
27.
Which adsorbent is commonly used in chromatography?
28.
Fractional distillation is preferred over simple distillation when boiling point difference is
29.
TLC is superior to paper chromatography because
30.
Which mixture cannot be separated by fractional distillation?
31.
Mobile phase in column chromatography is
32.
Increasing solvent polarity in chromatography causes Rf to
33.
Rf value is independent of
34.
Steam distillation is ineffective if compound is
35.
Steam distillation is based on the principle that total vapour pressure is
36.
Fractional distillation of crude oil gives
37.
Vacuum distillation lowers BP by
38.
Paper chromatography is an example of
39.
Which method is best to separate mixture of dyes?
40.
Steam distillation is suitable for compounds that are
41.
Glycerol is purified by vacuum distillation because
42.
Strongly adsorbed component moves
43.
In steam distillation, mixture boils when
44.
Azeotropic mixture distils
45.
Steam distillation prevents decomposition because
