CARBON & COMPOUND
1. Which of the following is an example of fossil fuel?
(A) coal gas
(B) coke
(C) natural gas
(D) producer gas
2. Most of the fuels are:
(A) carbon compounds with sulphur
(B) nitrogen compounds with carbon
(C) carbon compounds with hydrogen
(D) none of these
3. Destructive distillation of coal leads to the formation of
(A) wood
(B) kerosene
(C) ammoniacal liquor
(D) charcoal
4. When stream is passed over hot coke, it produces
(A) producer gas
(B) synthesis gas
(C) tear gas
(D) coal gas
5. Producer gas is a mixture of
(A) carbon monoxide and nitrogen gas
(B) carbon monoxide and hydrogen gas
(C) carbon monoxide and water vapour
(D) carbon monoxide and nitrous oxide
6. Which of the following is not obtained on fractional distillation of petroleum?
(A) Paraffin wax
(B) Asphalt
(C) Coal gas
(D) Petroleum gas
7. The property of an atom to form a bond with itself is known as:
(A) isomerism
(B) catenation
(C) allotropy
(D) none of these
8. In the hydrocarbon HC ≡ C – H, the covalency of carbon is:
(A) one
(B) two
(C) three
(D) four
9. Which of the following are isomers?
(A) ethane and propane
(B) ethane and ethene
(C) ethene and ethyne
(D) butane and isobutane
10. A hydrocarbon is:
(A) a compound containing carbon, hydrogen and oxygen
(B) is sodium hydrogen carbonate
(C) a compound containing carbon and hydrogen only
(D) a derivative of benzene
11. The formula of ethyne is:
(A) C2H2
(B) C6H6
(C) C2H4
(D) C2H6
12. The formula of tetrachloro methane is:
(A) CClH3
(B) CCl2
(C) CHCl3
(D) CCl4
13. An unsaturated hydrocarbon
(A) contains six carbon atoms
(B) contains fewer hydrogen atoms that is needed for carbon to have its usual valency of four
(C) contains excess hydrogen
(D) contains a chain of carbon atom
14. Water gas consists of:
(A) water vapour and coal dust
(B) a mixture of carbon monoxide and hydrogen
(C) a mixture of carbon monoxide and nitrogen
(D) water vapour and methane
15. The reaction of one mol of bromine with ethyne yields:
(A) BrCH2 – CH2Br
(B) BrCH = CHBr
(C) Br2CH – CHBr2
(D) CH3 – CH2Br
16. Which of the following gas is knwon as illuminating gas?
(A) Ethane
(B) Ethene
(C) Ethyne
(D) Propane
17. The gas used in the welding and cutting of metals is:
(A) ethane
(B) ethene
(C) ethyne
(D) propane
18. Which of the following does not give a positive test with alkaline solution of potassium permanganate?
(A) C10H22
(B) C6H12
(C) C10H18
(D) C10H20
19. The process by which smaller molecules combine to give a molecule with a higher molecular weight to known as:
(A) condensation
(B) polymerisation
(C) catenation
(D) isomerisation
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