Solved objective Questions on hydrocarbons and organic chemistry Sample paper
Organic Chemistry Practice Multiple Choice Questions.
General Organic Chemistry Questions
1. Complete combusting of Hydrocarbon produces
(a) CO + H2O
(b) CO + H2
(c) CO2 + H
(d) CO2 + H2O
Ans. (d)
2. Urea was first organic compound to be synthesized by
(a) Laminar
(b) Wohiar
(c) Beryine
(d) Haber
Ans. (b)
3. The variety of coal used as old house coal is
(a) Anthracite
(b) Peat
(c) Lignite
(d) Bituminous
Ans. (d)
4. The process by which smaller molecules combine to give a molecule with a higher molecular weight is known as
(a) Condensation
(b) Polymerization
(c) Catenation
(d) Isomerisation
Ans. (b)
5. Which of the following have lowest calorific value?
(a) C3H6
(b) C2H5OH
(c) C3H4
(d) H2
Ans. (b)
6. The chemical added to LPG to help detect its leakage is
(a) Isobutene
(b) Ethylamine
(c) Methyl mercaptan
(d) Ethyl mercaptan
Ans. (d)
7. Incomplete combustion of fuel produces
(a) CO2
(b) CO
(c) H2O
(d) H2
Ans. (b)
8. Which of the following are not obtained on fractional distillation of petroleum?
(a) Paraffin wax
(b) Asphalt
(c) Coal gas
(d) None of these
Ans. (c)
9. The lowest temperature at which a combustible substance catches fire?
(a) Critical Temperature
(b) Absolute temp
(c) Ignition temp
(d) None of these
Ans. (c)
10. The calorific values of wood, bituminous coal, natural gas and charcoal vary in the order:
(a) Wood > Bituminous > Natural gas > Charcoal
(b) Wood > Bituminous coal > Charcoal> Natural gas
(c) Natural gas > Charcoal > Bituminous coal > Wood
(d) Natural gas > Bituminous coal > Wood> Charcoal
Ans. (c)
11. The allotrope of carbon which is a good conductor of heat and electricity is
(a) Diamond
(b) Sugar charcoal
(c) Graphite
(d) Wood charcoal
Ans. (c)
12. The allotrope of carbon used in nuclear reactor is
(a) Graphite
(b) Diamond
(c) Coke
(d) Sugar Charcoal
Ans. (a)
13. Wood charcoal is used in gas masks because it
(a) Has good smell
(b) Dissolves poisonous gases
(c) Adsorbs poisonous gases
(d) Reacts with poisonous gases
Ans. (c)
14. The first organic substance ever prepared in the laboratory from inorganic compound is
(a) Urea
(b) Ethyl alcohol
(c) Methane
(d) Ethane
Ans. (c)
15. The first three members of a homologous series are CH4, C2H6, C3H8 the fifth member of this series will be
(a) C5H10
(b) C5H14
(c) C5H12
(d) C5H8
Ans. (c)
16. Hydrocarbons having double or triple bonds are known as
(a) Saturated hydro carbons
(b) Unsaturated hydrocarbon
(c) Alkenes
(d) Chalcogens
Ans. (b)
17. Some elements show the property of existing in two or more distinct physical form which shows different physical properties but same chemical properties. These distinct forms of an element are called
(a) Isomers
(b) Allotropes
(c) Compounds
(d) Isobars
Ans. (b)
18. Graphite is made artificially when a mixture of
(a) Sand and coke is heated electrically
(b) Silicon and iron is heated electrically
(c) Wood and iron is heated electrically
(d) Bones and iron is heated electrically
Ans. (a)
19. Methane is prepared in the Laboratory by heating a mixture of sodium acetate and
(a) Water soda
(b) Lime
(c) Lime stone
(d) Sodium carbonate
Ans. (b)
20. The property of self linkage of carbon atoms in called
(a) Polymerization
(b) Catenation
(c) Cracking
(d) Neutralization
Ans. (b)
