$C O_{2}$ is easily absorbed by :

N a C O_{3}

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N a H C O_{3}

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N a O H

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N a S O_{4}

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Solution

The correct option is C $N a O H$
$N a O H$ is a strong base. It reacts with acidic oxide $C O_{2}$ . Hence, $C O_{2}$ is easily absorbed by aqueous sodium hydroxide solution.

Whereas, sodium carbonate and sodium bicarbonate are weak bases. Their reaction with $C O_{2}$ is slow. Hence, their aqueous solutions cannot easily absorb $C O_{2}$ . The aqueous solution of sodium sulphate is neutral. Hence, it does not react with $C O_{2}$ . Therefore, it cannot absorb $C O_{2}$ .

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