Welcome to your P & C of OC -3
1.
Steam distillation is ineffective if compound is
2.
Fractional distillation is preferred over simple distillation when boiling point difference is
4.
In adsorption chromatography, stationary phase is
5.
Strong adsorption leads to
6.
TLC is mainly used for purification
7.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
8.
Which is NOT a mobile phase?
9.
In chromatography, separation is based on difference in
10.
Partition chromatography involves
11.
Thin layer chromatography stationary phase is usually
12.
Increasing solvent polarity in chromatography causes Rf to
13.
Paper chromatography is an example of
14.
Glycerol is purified by vacuum distillation because
15.
Chromatography is especially useful when substance is
16.
Fractional distillation of crude oil gives
17.
Vacuum distillation is used when a compound
18.
Rf value is independent of
19.
In steam distillation, mixture boils when
20.
Best method to identify unknown organic compound among many
21.
Fractional distillation involves
22.
Which compound cannot be purified by steam distillation?
23.
Which pair is best separated by fractional distillation?
24.
More volatile liquid distils
25.
TLC plate is visualized using
26.
Which method is best to separate mixture of dyes?
27.
Vacuum distillation lowers BP by
28.
In paper chromatography, stationary phase is
29.
Azeotropic mixture distils
30.
Steam distillation is based on the principle that total vapour pressure is
31.
Steam distillation is suitable for compounds that are
32.
Two compounds having same Rf value indicate
33.
Which adsorbent is commonly used in chromatography?
34.
Function of fractionating column is to increase
35.
Chromatography was introduced by
37.
Steam distillation prevents decomposition because
38.
Mobile phase in column chromatography is
39.
TLC is superior to paper chromatography because
40.
Chromatography fails if components have
41.
To break ethanol–water azeotrope, the added liquid must have
42.
Paper chromatography is used to separate
43.
Strongly adsorbed component moves
44.
Which mixture cannot be separated by fractional distillation?
45.
Vacuum distillation is also known as
