Organic Chemistry Practice Multiple Choice Questions

Organic Chemistry Practice Multiple Choice Questions
Problems and Objective Questions. Organic Chemistry
1. Destructive distillation of coal leads to the formation of
(a) Wood
(b) Kerosene
(c) Ammoniacal liquor
(d) Charcoal
Ans. (a)


2. In the hydrocarbon HC C—H, the covalence of carbon is
(a) One
(b) Two
(c) three
(d) four
Ans. (d)

3. Which of the following are isomers?
(a) Ethane and propane
(b) Ethane and ethene
(c) Ethene and ethyne
(d) Butane and isobutene
Ans. (d)


4. An unsaturated hydrocarbon
(a) Contains six carbon atoms
(b) contains fewer hydrogen atoms than is needed for carbon to have its usual valency of four
(c) Contains excess hydrogen
(d) Contains a chain of carbon atom
Ans. (b)

5. Which of these is not a fossil fuel?
(a) Coal
(b) LPG
(c) Bio gas
(d) Natural gas
Ans. (b)

6. A Gaseous fuel which does not contain carbon monoxide is
(a) Coal gas
(b) Natural gas
(c) Water gas
(d) Producer gas
Ans. (b)

7. Coal with largest C content is
(a) Anthracite
(b) Peat
(c) Lignite
(d) Bituminous
Ans. (a)

8. Which gas is produced when steam is passed over red hot coke?
(a) Produces gas
(b) CNG
(c) Water gas
(d) LPG
Ans. (c)

9. Which of the following is not true about Biogas?
(a) It contains Methane
(b) Bums without smoke
(c) Leaves ash behind
(d) Produced by anaerobic decomposition of animal and plant waste
Ans. (b)


10. Coal gas is mixture of
(a) CH4+H2+CO2+H2S
(b) CH4+H2+CO+H2S
(c) CH4 + H2 + CO
(d) Ethane, propane, butane
Ans. (c)

11. An allotropic form of carbon used for cutting and drilling is
(a) Charcoal
(b) Bone Charcoal
(c) Graphite
(d) Diamond
Ans. (d)

12. The variety of coal having highest carbon content is
(a) Peat
(b) Anthracite
(c) Bituminous
(d) Lignite
Ans. (b)

13. Chemistry of carbon compounds is known is
(a) Organic chemistry
(b) Inorganic chemistry
(c) Physical chemistry
(d) Biochemistry
Ans. (a)

14. Compounds of carbon and hydrogen are called
(a) hydrocarbon
(b) Petrol
(c) Carbon dioxide
(d) Carbohydrates
Ans. (a)

15. Which substance is also known as Marsh gas?
(a) Methane
(b) Solid Carbon dioxide
(c) Carbon monoxide
(d) Ammonia
Ans. (a)

16. Methane reacts with chlorine in the presence of sunlight. If this reaction is allowed to continue, the end product formed will be
(a) Carbon tetrachloride
(b) Chloroform
(c) Ethylene Chloride
(d) Chalcogens
Ans. (a)

17. Crystalline form of carbon having 60 carbon atoms joined together
(a) polymer
(b) Buckminster Fullerene
(c) Coal
(d) Diamond
Ans. (b)

18. The molecular formula of butane is
(a) C4H10
(b) C5H12
(c) C4H8
(d) C4H6
Ans. (a)


19. The molecular formula of a methyl group is
(a) CH4
(b) CH3
(c) CH
(d) CH2
Ans. (b)

20. A process in which a change is brought by ferment such as yeast, enzymes which convert sugar into ethyl alcohol is called
(a) Polymerization
(b) Acetylation
(c) Hydrogenation
(d) Fermentation
Ans. (d)

21. Breaking of higher hydrocarbon into lower one by heat is called
(a) Neutralization
(b) Polymerization
(c) Cracking
(d) Acetylating
Ans. (c)

22. The carbon atoms in diamond are bonded to each other by
(a) Ionic bond
(b) Coordinate bond
(c) Hydrogen bonds
(d) Covalent bonds
Ans. (d)

23. Which of the following compounds with behave as an unsaturated hydrocarbon?
(a) Butane
(b) Ethane
(c) Ethyl alcohol
(d) Ethene
Ans. (d)

24. What type of reaction occurs between ethene and hydrogen?
(a) Addition
(b) Dehydration
(c) Substitution
(d) Oxidation
Ans. (a)

25. Acetylene polymerizes to give
(a) Benzene
(b) Polyacetylene
(c) Butane
(d) octane
Ans. (a)