Coal and petroleum Worksheet-2

Coal and petroleum Worksheet-2

11. Coal gas is obtained as ______.

A. a by-product while extracting coal

B. a by-product in refining of petrol

C. a by-product of the process of manufacturing coke.

12. Petroleum and natural gas were formed from the remains of _______ that died millions of years ago.

A. Plants and trees                       B. Tiny marine organisms

C. Shrubs                                       D. Algae and fungi

13. Which of the following is almost pure form of carbon?

A. Coke                                           B. Coal tar

C. Coal gas                                     D. None of these

14. Coal gas _____.

A. Is inflammable gaseous fuel

B. Is obtained as a by-product of manufacture of coke

C. Was extensively used in 19th and 20th century for lightening cooking and heating

D. All of these

15. Coal tar is used _____.

A. As fuel

B. As starting material for manufacture of dyes, explosives, plastics, paints

C. In the extraction of copper from its ore.

D. None of these

16. Naphthalene balls are obtained _____.

A. As byproduct of petroleum refining

B. From coke

C. From coal tar

D. From coal gas

17. Which gas is obtained during the processing of coal?

A. Carbon dioxide                        B. Coal gas

C. Carbon monoxide                   D. Sulphur dioxide

18. Which is more volatile petrol or diesel?

A. Petrol

B. Diesel

C. Both Petrol and Diesel

19. Petroleum is a mixture of ______.

A. Hydrocarbons                          B. Sulphur compounds

C. Nitrogen compounds              D. Oxides

20. What can you say about the boiling point of liquids that collect at the bottom as residue?

A. They have high boiling points

B. They have moderate boiling points

C. They have low boiling points

Answer:

11. C

Explanation: It is a gaseous fuel obtained as a by-product of the process of manufacturing coke. Before the development of natural gas supplies, it was used as domestic and lighting fuel.

12. B

13. A

Explanation: Coke is produced by heating coal to a very high temperature in the absence of air. Coke is a grey hard porous rock. 98% of coke is carbon. It is largely used for extracting iron from its ore. It is also used in the manufacture of steel. Coke is a good fuel and burns without smoke.

14. D

15. B

16. C

17. B

18. A

19. A

Explanation: Petroleum or crude oil is a complex mixture of solid, liquid, and gaseous hydrocarbons

20. A

The boiling point of the liquid that collects at the bottom as residue has high boiling point.