Coal & Petroleum

Coal and petroleum Worksheet-1

1. Lignite is

A. brownish-black coal with high moisture and ash content

B. dull black coal with low moisture and ash content

C. hard coal with high heating value

2. Inexhaustible natural resources in nature are-

A. limited                                       B. Unlimited

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

Coal and petroleum Worksheet-3

21. Why do different gases condense to liquids on different trays in the column while refining of petroleum?

A. Vapours of petroleum cool and condense at different points depending on their  condensation temperature

B. Vapours of petroleum cool and condense at different points depending on their boiling points

C. Vapours of petroleum cool and condense at different points depending on their melting points

22. The layer containing petroleum oil & natural gas is ______.

A. Above that of water                 B. Below water

C. Between water and sand       D. Below sand