Q 1. A bottle containing two immiscible liquids is given to you. They may be separated by
using a:
(a) fractionating column
(b) separating funnel
(c) vaccum distillation
(d) steam distillation
Q 2.
A mixture of oil and water is separated by:
(a) filtration
(b) fractional distillation
(c) sublimation
(d) using separating funnel
Q 3.
Fractional crystallisations is carried out to separate a mixture of:
(a) organic solids mixed with inorganic solids
(b) organic solids slightly soluble in water
(c) organic solids having small difference solubilities in suitable solvent
(d) organic solids having great difference solubilities in suitable solvent
Q 4.
Impure naphthalene is purified by:
(a) fractional crystallization
(c) soxhlet extraction
(b) fractional distillation
(d) sublimation
Anthracene is purified by:
(a) filtration
(b) distillation
(c) crystallisation
Q 5.
(d) sublimation
Q 6.
A mixture of camphor and benzoic acid can be easily separated by:
(a) sublimation
(b) extraction with solvent
(c) fractional crystallisation
(d) chemical method
Q 7.
In a solution, solvent can be separated from solute by one of the following process:
(a) Decantation
(b) Filtration
(c) Distillation
(d) Sedimentation
Q 8.
Which of the following is useful for making pure water from a solution of salt in water?
(a) Filtration
(b) Distillation
(c) Chromatography (d) Steam distillation
Q 9.
A mixture of acetone and methanol can be separated by:
(a) steam distillation (b) vaccum distillation (c) fractional distillation (d) none of these
Q 10. Fractional distillation is useful in distillation of:
(a) petroleum
(b) coal-tar
(c) crude alcohol
(d) all of these
Q 11. Impure glycerine can be purified by:
(a) steam distillation (b) simple distillation (c) vacuum distillation (d) extraction with a
solvent
Q 12. Vacuum distillation is used to purify liquids which:
(a) are highly volatile
(b) are explosive in nature
(c) decompose below their boiling points
(d) have high b.p.
Q 13. Aniline is purified by:
(a) steam distillation
(c) Vacuum distillation
(b) simple distillation
(d) Extraction with a solvent
Q 14. A mixture of iron fillings and sulphur cannot be separated by:
(a) Heating
(b) magnetism
(c) shaking with CS2 (d) washing in a
current of water
Q 15. Azeotropic mixtures:
(a) boil at different temperature
(c) are constant boiling mixtures
(b) are mixtures of solids
(d) are none of the above
Q 16. Absolute alcohol cannot be obtained by simple fractional distillation because:
(a) Pure C2H5OH is unstable
(b) C2H5OH forms hydrogen bonds with water
(c) boiling point of C2H5OH is very close to that of water
(d) constant boiling azeotropic mixture is formed with water
Q 17. A good solvent for sulphur is:
(a) CCl4
(b) CS2
(c) H2O
(d) toluene
Q 18. Chromatography was discovered by:
(a) Kekule
(b) Pauling
(c) Rutherford
(d) Tswett
Q 19. Chromatography technique is used for the separation of:
(a) small samples of mixture
(b) plant pigments
(c) dyestuff
(d) all of the above
Q 20. In paper chromatography:
(a) mobile phase is liquid and stationary phase is solid
(b) mobile phase is solid and stationary phase is liquid
(c) both phases are liquids
(d) both phases are solids
Q 21. Carbon and hydrogen are estimated in organic compounds by:
(a) Kjeldahl’s method
(b) Duma’s method
(c) Liebig’s method
(d) Carrius method
Q 22. Lassaigne’s test is used for the detection of:
(a) carbon only
(b) hydrogen only
(c) oxygen only
(d) nitrogen, sulphur and halogens
Q 23. Nitrogen containing organic compound when fused with sodium forms:
(a) sodium azide
(b) sodium cyanide (c) sodamide
(d) sodium cyanate
Q 24. The sodium extract of an organic compound on treatment with FeSO4 solution, FeCl3 and
HCl gives a red solution. The organic compound contains:
(a) both nitrogen and sulphur
(b) nitrogen only
(c) sulphur only
(d) halogen
Q 25. The prussian blue colour obtained during the test of nitrogen by Lassaigne’s test is due to
the formation of:
(a) Fe4[Fe(CN)6]3
(b) Na4[Fe(CN)6]
(c) Fe3[Fe(CN)6]4
(d) Fe2[Fe(CN)6]
Q 26. Which of the following sodium compound/compounds are formed when an organic
compound containing both nitrogen and sulphur is fused with sodium?
(a) Cyanide and sulphide
(b) Thiocyanate
(c) Sulphite and cyanide
(d) Nitrate and sulphide
Q 27. The sodium extract of an organic compound on acidification with acetic acid and addition
of lead acetate solution gives a black precipitate. The organic compound contains :
(a) nitrogen
(b) halogen
(c) sulphur
(d) phosphorus
Q 28. Copper wire test of halogens is known as :
(a) Liebig’s test
(b) Lassaigne’s test
(c) Fusion test
(d) Beilstein’s test
Q 29. An organic compound on heating with CuO produces CO2 but no water. It may be:
(a) CH4
(b) C2H5I
(c) CHCl3
(d) CCl4
Q 30. In Kjeldahl’s method, copper sulphate acts as:
(a) an oxidising agent
(b) a reducing agent
(c) a catalytic agent
(d) a hydrolysing agent
Q 31. In the estimation of sulphur in an organic compound, fuming nitric acid is used to convert
sulphur into:
(a) SO2
(b) H2S
(c) H2SO3
(d) H2SO4
Q 32. Mark the incorrect statement In nitrogen Kjeldahl’s method of estimation :
(a) nitrogen gas is collected over caustic potash solution
(b) potassium sulphate is used as boiling point elevator of H2SO4
(c) copper sulphate or mercury acts as a catalyst
(d) nitrogen is quantitatively decomposed to ammonium sulphate
Q 33. An organic compound contains about 52% carbon. It could be could be :
(a) only ethanol
(b) only dimethyl ether
(c) both (a) and (b)
(d) none of these
Q 34. A compound containing 80% C and 20% H is likely to be :
(a) C6H6
(b) C2H6
(c) C2H4
(d) C2H2
Q 35. The simplest formula of a compound containing 50% of element X (at wt. 10) and 50%
of element Y (at wt.20) is :
(a) XY
(b) XY2
(c) X2Y
(d) X2Y2
Answers
1.
8.
15.
22.
29.
b
b
c
d
d
2.
9.
16.
23.
30.
d
c
d
b
c
3.
10.
17.
24.
31.
c
d
b
a
d
4.
11.
18.
25.
32.
d
c
d
a
a
5.
12.
19.
26.
33.
d
c
d
b
c
6.
13.
20.
27.
34.
d
a
a
c
b
7.
14.
21
28
35.
c
a
c
d
c