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प्रश्न
What are fossil fuels?
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उत्तर
Fuels formed in the geological past from the remains of living organisms and plants etc. Examples of fossil fuels are coal, petroleum, and natural gas, etc.
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संबंधित प्रश्न
Name two sources of energy which you consider to be non-renewable. Give reason for your choice.
Classify the following
Coal, Wind, Tides, Petroleum,Wood, Natural gas
What is the basis of above classification?
Which of the following is not a renewable source of energy?
(a) wind
(b) flowing water
(c) fossil fuels
(d) fuel wood
The calorific values of three fuels A, B and C are 33 kJ/g, 48 kJ/g and 150 kJ/g, respectively. A is solid, B is liquid and C is a gas at room temperature. One combustion, both A and B produce carbon dioxide while C explodes forming steam. B and C leave no residue after combustion while A leaves behind some solid residue. Which one of the three fuels is the most ideal? Give two reasons to support your answer.
What are the various fuels which are used to generate electricity in a thermal power plant?
Write a short note on the pollution caused by burning fossil fuels.
What are the various steps which can be taken to control (or reduce) pollution caused by burning fossil fuels?
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
The natural gas consists mainly of:
(a) methane
(b) ethane
(c) propane
(d) butane
LPG consists mainly of:
(a) butane
(b) ethane
(c) butanone
(d) methane
What is biomass? Give three examples of biomass.
Suggest a safe and efficient method for the disposal of biowastes and sewage materials. How is this method advantageous to us?
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
The world's known coal reserves are expected to last for about:
(a) 200 years
(b) 400 years
(c) 500 years
(d) 100 years
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
Describe the four major types of coal.
Acid rain happens because ______.
What is non-renewable resources?
Why is there a need to harness non-conventional sources of energy? Give two main reasons.
Imagine that all the exhaustible natural resources are exhausted by human activities. Do you think survival of living beings would be possible? If yes, why? If not, why not?
