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प्रश्न
Fill in the blank
Coal, petroleum, and natural gas are _________fuels.
उत्तर
Coal, petroleum, and natural gas are fossil fuels.
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संबंधित प्रश्न
Compare and contrast fossil fuels and the Sun as direct sources of energy
The fuel having the lowest calorific value is:
(a) coal
(b) wood
(c) charcoal
(d) kerosene
Most of the fuels contain carbon as one of the constituents. Name a fuel which has very high calorific value but not contain carbon.
What are the various fuels which are used to generate electricity in a thermal power plant?
What are the disadvantages of burning fossil fuels?
The main constituent of petroleum gas is:
(a) methane
(b) ethane
(c) butane
(d) propane
Which of the following is not a fossil source of energy?
(a) kerosene oil
(b) cow-dung cakes
(c) CNG
(d) coal
Coal cannot be converted into one of the following forms of energy. This is:
(a) coal gas
(b) electricity
(c) oil
(d) charcoal
The pollution of air caused by burning petroleum fuels (like petrol and diesel) in vehicles can be controlled by fitting a device X in the exhaust system of vehicles.
Name the device
What is biomass? Give three examples of biomass.
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
Select the renewable and non-renewable sources of energy from the following :
- Coal
- Wood
- Water
- Diesel
- Wind
- Oil
Renewable source of energy is :
State whether the following is True or False.
Coal and petroleum are renewable energy resources.
State whether the following is True or False.
Coal takes millions of years to form.
Explain why is it no wise to regard wood as a renewable sources of energy.
Which of the following is a non-renewable source of energy?
Acid rain happens because ______.
