Name: Coal, Oil, and Gas
Uploaded: 2019-07-19
Duration: 2 min 56 s
Description: Fossil fuels have many uses. It is used to generate electricity and in transportation as fuel for automobiles and jets. But do you know how it is produced?

Question

Solve the crossword with the help of the clues given below.

ACROSS

1. A byproduct of petroleum not used as a fuel.

3. Organisation which promotes the conservation of petroleum.

6. An inexhaustible source of energy.

7. Petroleum by product used as auto fuel.

DOWN
1. Rainwater containing dissolved oxides of sulphur and nitrogen.

2. A gas obtained by heating coal and containing methane and hydrogen.

4. A product obtained from coal used in metallurgy.

5. A variety of coal.

Accepted Answer

1. Asphalt is black or brown petroleum-like material that has a consistency varying from viscous liquid to glassy solid. It is obtained either as a residue from the distillation of petroleum or from natural deposits. It is not used as a fuel rather it is used in making roads.

3. Coal and petroleum are fossil fuels. These are formed in nature by very slow process inside the earth. If consumed at a rate faster than the rate at which these are formed in nature, these will get exhausted very soon. As per present estimate the existing petroleum reserves might get exhausted in the next fifty years. Coal deposits might last for another 150 to 200 years. This would lead to the energy crisis. Therefore, we must take proper steps to conserve these natural resources. The Petroleum Conservation Research Association (PCRA) promotes the conservation of petroleum.

6. Sunlight is an inexhaustible source of energy capable of fulfilling all the energy needs of humankind. The energy from the sun can be converted into electricity or used directly.

7. Diesel fuel is a mixture of hydrocarbons—with boiling points in the range of $150$ to $380 ° C$ —which are obtained from petroleum. It is used as a fuel for trucks, buses, water pumps, railway engines, etc.

Down

1. Acid rain, as the name suggests, can be said as the precipitation of acid in the form of rain in the simplest manner. When atmospheric pollutants like oxides of nitrogen and sulphur react with rainwater and come down with the rain, then this results in Acid Rain.

2. The gaseous product obtained by the destructive distillation of coal is called coal gas. The main constituents of coal gas are hydrogen, methane and carbon monoxide. Coal gas is a flammable gaseous fuel made from coal and supplied to the user via a piped distribution system. It is produced when coal is heated strongly in the absence of air.

4. The greyish-black residue left after the destructive distillation of coal is called coke. Coke is obtained from coal by removing moisture and other volatile matter from it. It is used as a reducing agent in metallurgical processes.

5. Lignite is a soft, brown, combustible, sedimentary rock formed from naturally compressed peat. It has a carbon content around $25 - 35 %$ .

Important Questions on Coal and Petroleum

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