Welcome to your P & C of OC -3
1.
Which is NOT a mobile phase?
2.
Fractional distillation of crude oil gives
3.
Fractional distillation is preferred over simple distillation when boiling point difference is
4.
Best method to identify unknown organic compound among many
6.
Ortho-nitrophenol is steam distilled more easily than para-nitrophenol because
7.
Fractional distillation involves
8.
Azeotropic mixture distils
9.
TLC is mainly used for purification
10.
Which adsorbent is commonly used in chromatography?
11.
Increasing solvent polarity in chromatography causes Rf to
12.
Chromatography is especially useful when substance is
13.
In steam distillation, mixture boils when
14.
Glycerol is purified by vacuum distillation because
16.
Chromatography fails if components have
17.
Which pair is best separated by fractional distillation?
18.
In paper chromatography, stationary phase is
19.
More volatile liquid distils
20.
In chromatography, separation is based on difference in
21.
To break ethanol–water azeotrope, the added liquid must have
22.
Rf value is independent of
23.
Steam distillation prevents decomposition because
24.
Which method is best to separate mixture of dyes?
25.
TLC plate is visualized using
26.
Thin layer chromatography stationary phase is usually
27.
Paper chromatography is used to separate
28.
Which mixture cannot be separated by fractional distillation?
29.
Chromatography was introduced by
30.
Paper chromatography is an example of
31.
In adsorption chromatography, stationary phase is
32.
Mobile phase in column chromatography is
33.
TLC is superior to paper chromatography because
34.
Vacuum distillation lowers BP by
35.
Steam distillation is suitable for compounds that are
36.
Steam distillation is ineffective if compound is
37.
Steam distillation is based on the principle that total vapour pressure is
38.
Which compound cannot be purified by steam distillation?
39.
Vacuum distillation is also known as
40.
Strong adsorption leads to
41.
Function of fractionating column is to increase
42.
Strongly adsorbed component moves
43.
Vacuum distillation is used when a compound
44.
Partition chromatography involves
45.
Two compounds having same Rf value indicate
