The most abundant acidic gas present in the atmosphere is:

C O_{2}

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S O_{2}

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N O

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N O_{2}

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Solution

The correct option is B $C O_{2}$
Carbon dioxide is soluble in water in which it forms carbonic acid which is a weak acid since its ionization in water is incomplete. It exists in Earth's atmosphere as a trace gas at concentration of about 0.04% by volume. It is the primary source of carbon in life on Earth.

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