Advertisements
Advertisements
प्रश्न
The fuel which is not obtained from biomass is:
(a) firewood
(b) cow-dung cakes
(c) coke
(d) charcoal
उत्तर
coke
Coke cannot be obtained from biomass.
APPEARS IN
संबंधित प्रश्न
Name two sources of energy which you consider to be non-renewable. Give reason for your choice.
Coal is said to be formed from the wood of trees. Why then is coal considered to be a non-renewable source of energy whereas wood is a renewable source of energy?
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.
Describe how fossil fuels were formed.
Name the clean fuel which can be obtained from cow-dung.
What are renewable energy resources?
Give an account of the use of solar energy.
Can you tell?
Why should we maximise the use of non-conventional energy resources?
Why is there a need for harnessing non-conventional sources of energy? How can energy be harnessed from the sea in different ways?
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?