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प्रश्न
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
उत्तर
oxygen
Oxygen is not required for the production of biogas.
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संबंधित प्रश्न
A non-renewable source of energy is:
(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas
Name the component which is found in natural gas well as in biogas.
What are the various steps which can be taken to control (or reduce) pollution caused by burning fossil fuels?
Fill in the following blank with suitable word:
Tidal waves build up and recede ........... a day.
The world's known coal reserves are expected to last for about:
(a) 200 years
(b) 400 years
(c) 500 years
(d) 100 years
State whether the following is True or False.
China, the USA, and Spain are major producers of wind energy.
Who is the odd one out?
Explain why is it no wise to regard wood as a renewable sources of energy.
Choose the odd one:
Make a list of conventional and non-conventional sources of energy. Give a brief description of harnessing one nonconventional source of energy.
