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प्रश्न
State what do you understand by the term ‘air’. Explain its importance to mankind.
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उत्तर
Air is a mixture whose composition varies at different intervals of time and different places of the world. Man cannot survive without air and water and hence the air is very essential for survival.
संबंधित प्रश्न
Write ‘True’ or ‘False’ in front of following statement.
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