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प्रश्न
Complete the crossword in figure with the help of the clues:
Across
1. Fuels obtained from dead remains of living organisms. (6, 5)
2. A process by which the various constituents of petroleum are separated. (8)
3. A porous black substance obtained from coal. (4)
4. Another name for motor fuel. (6)
Down
5. The substance obtained by carbonisation. (4)
6. Fuel for heavy motor vehicles. (6)
7. A petroleum product used for road surfacing. (7)
8. Dead remains of sea animals got converted into it. (9)
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उत्तर
Across
1. Fossil fuels
2. Refining
3. Coke
4. Petrol
Down
5. Coal
6. Diesel
7. Bitumen
8. Petroleum
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संबंधित प्रश्न
Classify the following into renewable and non-renewable sources of energy:
Coal, Wind, Tides, Petroleum,Wood, Natural gas
Name any four fractions obtained from petroleum which are used as fuels.
State two important uses of natural gas
Fossil fuels are energy rich compounds of an element X which were originally made by the plants with help of sun's energy.
Name the element X.
Describe the construction and working of a biogas plant with the help of a labelled diagram.
What type of nuclear reaction is responsible for the liberation of energy:
in the sun?
The world's known coal reserves are expected to last for about:
(a) 200 years
(b) 400 years
(c) 500 years
(d) 100 years
Why should we conserve the non-renewable sources of energy?
Why are fossil fuels called non-renewable sources of energy?
Write True/False against the following statement.
Resources which are present in unlimited quantity in nature are called exhaustible natural resources.
