Which is the second most abundant gas present in the atmosphere?

Nitrogen

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Oxygen

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Ozone

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Carbon-dioxide

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Solution

The correct option is B
Oxygen

Nitrogen is the most abundant gas present in the atmosphere constituting 78% of air. Oxygen makes up about 21% of air by volume and is the second most abundant gas present in the atmosphere. It is essential for the survival of human beings. Carbon-dioxide is present in 0.03% of air. Other gases are present in 1.03% of air.

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Which is the most abundant gas in the atmosphere?

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