Coal and petroleum Worksheet-1

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

C. Scarce                                        D. Not present

3. Fossils are-

A. The dead remains of plastics

B. The dead remains of living organism

C. Kind of natural resource

4. The first substance produced during the process of formation of coal is-

A. Lignite                                        B. Bituminous coal

C. Peat                                            D. Anthracite

5. _____ has highest carbon content.

A. Anthracite                                 B. Lignite

C. Bituminous                               D. Subbituminous coal

6. The softest coal is _____.

A. Anthracite                                 B. Lignite

C. Bituminous                               D. Subbituminous coal

7. ______ is a hard dry fuel produced by heating bituminous coal to a very high temperature in the absence of air.

A. Coke                                           B. Coal tar

C. Coal gas                                     D. All of these

8. The energy in coal comes from the energy stored by _____ that lived hundreds of millions of years ago in swampy forests.

A. Plants                                         B. Animals

C. Marine animals                       D. Insects

9. Coal mainly contains

A. Hydrogen     B. Oxygen                   C. Carbon          D. Sodium

10. Carbonisation is ______.

A. Slow conversion of dead vegetation into coal

B. Deposition of soil

C. falling of trees

D. None of these

Answer:

1. A

Explanation: Lignite is a brownish-black coal with high moisture and ash content, which has the lowest heating value of the four types of coal. It is considered an “immature” coal that is still soft. It is used for generating electricity.

2. B

3. B

4. C

Explanation: Trees and other plants that grew in swampy areas 300 to 400 million years ago died and their remains got buried in the swampy soil. Over time, these remains were covered with layers of sediments such as mud and sand. In low-oxygen conditions, the buried plant material formed a dark brown material called peat.

5. A

Explanation: Anthracite has 92.1-98 % carbon.

6. B

Explanation: Lignite is the softest coal of all the types.

7. D

8. A

Coal is formed by burying of dead trees and other plants that grew in swampy areas 300 to 400 million years ago. Over time, these remains were covered with layers of sediments such as mud and sand.

9. C

10. A