Welcome to your P & C of OC -3
1.
Chromatography fails if components have
2.
Strongly adsorbed component moves
3.
Fractional distillation involves
4.
Steam distillation is suitable for compounds that are
5.
Paper chromatography is used to separate
7.
Vacuum distillation is used when a compound
8.
Which method is best to separate mixture of dyes?
9.
More volatile liquid distils
10.
TLC plate is visualized using
11.
Increasing solvent polarity in chromatography causes Rf to
12.
Strong adsorption leads to
13.
Fractional distillation is preferred over simple distillation when boiling point difference is
14.
Which pair is best separated by fractional distillation?
15.
Function of fractionating column is to increase
16.
Two compounds having same Rf value indicate
17.
Chromatography was introduced by
18.
Vacuum distillation lowers BP by
19.
Mobile phase in column chromatography is
20.
To break ethanol–water azeotrope, the added liquid must have
21.
Which adsorbent is commonly used in chromatography?
22.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
23.
In steam distillation, mixture boils when
24.
Steam distillation is based on the principle that total vapour pressure is
25.
Azeotropic mixture distils
26.
TLC is mainly used for purification
27.
Fractional distillation of crude oil gives
28.
In paper chromatography, stationary phase is
29.
Glycerol is purified by vacuum distillation because
30.
In chromatography, separation is based on difference in
31.
TLC is superior to paper chromatography because
32.
Paper chromatography is an example of
34.
Steam distillation prevents decomposition because
35.
Which compound cannot be purified by steam distillation?
36.
Thin layer chromatography stationary phase is usually
37.
Chromatography is especially useful when substance is
38.
Vacuum distillation is also known as
39.
Which mixture cannot be separated by fractional distillation?
40.
Partition chromatography involves
41.
Steam distillation is ineffective if compound is
42.
Rf value is independent of
43.
Which is NOT a mobile phase?
44.
Best method to identify unknown organic compound among many
45.
In adsorption chromatography, stationary phase is
