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प्रश्न
State whether the following is True or False.
Coal takes millions of years to form.
पर्याय
True
False
उत्तर
True
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संबंधित प्रश्न
On what basis would you classify energy sources as
(a) renewable and non-renewable?
(b) exhaustible and inexhaustible?
Are the options given in (a) and (b) the same?
An examples of a renewable source of energy is:
(a) petrol
(b) natural gas
(c) biogas
(d) kerosene
The fuel having the lowest calorific value is:
(a) coal
(b) wood
(c) charcoal
(d) kerosene
Name any one hydrocarbon fraction obtained during the fractional distillation of petroleum which is used as a domestic fuel.
The aviation fuel which is used in the engines of jet aeroplanes is:
(a) diesel
(b) kerosene
(c) petrol
(d) CNG
Name the original source of wind energy.
Which of the following sources of energy are not derived from the sun?
Biomass, Wind, Ocean thermal energy, Geothermal energy, Nuclear fuels, Hydroelectricity, Wave energy, Coal, Petroleum, Tidal energy
Name the major component of biogas.
What are the raw materials used for making biogas?
One of the following is not required in the formation of biogas in a biogas plant. This is:
(a) cow-dung
(b) water
(c) oxygen
(d) anaerobic bacteria
The fossil fuel whose known reserves in the earth are expected to last for the minimum period is:
(a) coal
(b) uranium
(c) petroleum
(d) natural gas
Fill in the blank
__________ are examples of renewable energy resources.
Describe the four major types of coal.
Why should we conserve the non-renewable sources of energy?
Air is a natural resource and cannot be exhausted by human activities. It is known as inexhaustible natural resource. Which of the following is another inexhaustible natural resource?
Write True/False against the following statement.
Oxygen in air is an exhaustible natural resource.
Write True/False against the following statement.
Wildlife is an exhaustible natural resource.
Sunlight and air are inexhaustible natural resources. Comment.
Match the items given in Column I with the items of Column II.
| Column I | Column II |
| (a) Used for road surfacing | (i) Black gold |
| (b) Natural gas | (ii) Vaseline and candles |
| (c) Petroleum | (iii) Bitumen |
| (d) Paraffin wax | (iv) CNG |
Why petrol is exhaustible natural resource whereas sunlight is not? Explain.
