CO₂ gas is smell less and colourless gas. It dissolves in water to give :
(I) dibasic acid carbonic acid.
(II) carbonic acid gives two types of salts ${HCO}_{3}^{-} {and CO}_{3}^{2 -} .$

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Only (l) is correct

None is correct

Only (ll) is correct

Both (l) and (ll) are correct

answer is A.

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Detailed Solution

$\begin{aligned} H_{2} O + {CO}_{2} ⟶ H_{2} {CO}_{3} \\ H_{2} {CO}_{3} ⇌ H^{+} + {HCO}_{3}^{-} \\ {HCO}_{3}^{-} ⇌ H^{+} + {CO}_{3}^{2 -} \end{aligned}$

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