Which of the following is less soluble in water and forms weakly acidic aqueous solution?

O_{2}

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{C O}_{2}

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N_{2}

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H_{2} {S O}_{4}

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H e

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Solution

The correct option is B ${C O}_{2}$
$C O_{2}$ is a non-polar compound. It is less soluble in water, but when added in water forms a weakly acidic aqueous solution.
$C O_{2} + H_{2} O \to H_{2} C O_{3}$
$H_{2} C O_{3} \to 2 H^{+} + C O_{3}^{2 -}$

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