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-p-Block elements - I — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry-p-Block elements - I1 Mark
MCQ
The species present in solution when $\mathrm{CO}_2$ is dissolved in water are
  • ✓
    $\mathrm{CO}_2, \mathrm{H}_2 \mathrm{CO}_3, \mathrm{HCO}_3^{-}, \mathrm{CO}_3^{2-}$
  • B
    $\mathrm{H}_2 \mathrm{CO}_3, \mathrm{CO}_3^{2-}$
  • C
    $\mathrm{CO}_3^{2-}, \mathrm{HCO}_3^{-}$
  • D
    $\mathrm{CO}_2, \mathrm{H}_2 \mathrm{CO}_3$
✓

Answer

Correct option: A.
$\mathrm{CO}_2, \mathrm{H}_2 \mathrm{CO}_3, \mathrm{HCO}_3^{-}, \mathrm{CO}_3^{2-}$
a
$\mathrm{CO}_2+\mathrm{H}_2 \mathrm{O} \rightleftharpoons \mathrm{H}_2 \mathrm{CO}_3 \rightleftharpoons \mathrm{H}^{+}+\mathrm{HCO}_3^{-} \rightleftharpoons \mathrm{H}^{+}+\mathrm{CO}_3^{-2}$

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