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How does coal formation takes place in nature?

Important Questions on Coal and Petroleum

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List any three advantages and disadvantages of solar energy. 
EASY
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Solar energy is treated as the energy source of the future. Write any two solar devices working on solar energy that can be utilised in daily life.
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Name two uses biogas.
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Which of the following is the main component of petroleum gas?
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Label 1 and 2 in the given figure.

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Write any three advantages and disadvantages of solar cell panels.
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Which of the following is not an example of a bio-mass energy source?
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What is meant by renewable and non-renewable sources of energy? Give one example of each
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Name the major constituent of biogas. Write the properties of biogas which make it a good fuel.
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Name the two devices that work using heat energy of the sun.
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Write one example each for fossil fuels in a solid and liquid state.
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What are the limitations in harnessing wind energy?

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Which fossil fuel produces ammonia when distilled in the absence of air?
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Which of the following is not an example of a bio-mass energy source?
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Draw a labelled diagram of the Solar cooker.
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Give an example of non-conventional energy with the help of which electricity can be generated.

EASY
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Which of the following variety of coal contains the highest percentage of carbon? 
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Explain the working of a solar water heater with the help of a labelled diagram.
EASY
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Nowadays bio-diesel is used in transportation vehicles as an alternate to diesel. Write two advantages of this measure.
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Plane mirror reflector is used inside the solar cooker box. Explain why.