Which of the following statements are true?

Air is a mixture of gases, water vapour

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Air is a pure gas

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Air is composed of only nitrogen

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Air is composed of only oxygen

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Solution

The correct option is A Air is a mixture of gases, water vapour
Air is a mixture of invisible gases, that surrounds the earth. It mainly consists of gases namely nitrogen (78%), oxygen (21%), argon (0.9%), carbon-dioxide (0.03%) and water vapour. Composition of air is as follows:

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Which of the following statements are true?

The correct option is A Air is a mixture of gases, water vapourAir is a mixture of invisible gases, that surrounds the earth. It mainly consists of gases namely nitrogen (78%), oxygen (21%), argon (0.9%), carbon-dioxide (0.03%) and water vapour. Composition of air is as follows:

The correct option is A Air is a mixture of gases, water vapour
Air is a mixture of invisible gases, that surrounds the earth. It mainly consists of gases namely nitrogen (78%), oxygen (21%), argon (0.9%), carbon-dioxide (0.03%) and water vapour. Composition of air is as follows: