\([\mathrm{x}]+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow[\mathrm{y}]\) a colourless gas with irritating…

\([\mathrm{x}]+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow[\mathrm{y}]\) a colourless gas with irritating smell; \([\mathrm{y}]+\mathrm{k}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4} ightarrow\) green solution. \([\mathrm{x}]\) and \([\mathrm{y}]\) is:
  1. \(\mathrm{SO}_{3}^{2-}\) and \(\mathrm{SO}_{2}\)
  2. \(\mathrm{Cl}^{-}\) and \(\mathrm{HCl}\)
  3. \(\mathrm{S}^{2-}\) and \(\mathrm{H}_{2} \mathrm{~S}\)
  4. \(\mathrm{CO}_{3}^{2-}\) and \(\mathrm{CO}_{2}\)

Solution

Colourlers gas with issitating smell: \(\mathrm{SO}_{2}\) or \(\mathrm{H}_{2} \mathrm{~S} .\)
\(\mathrm{SO}_{2}+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4} ightarrow \mathrm{SO}_{4}^{2-}+\underset{\text {Geen}}{\mathrm{Cr}^{+3}}\)
\([\mathrm{x}]+\mathrm{H}_{2} \mathrm{SO}_{4} ightarrow[\mathrm{y}]\)
\(\underset{[\mathrm{x}]}{\mathrm{SO}_{3}^{2}}+\underset{\text{dil.}}{\mathrm{H}_{2} \mathrm{SO}_{4}} \longrightarrow \mathrm{SO}_{4}^{2-}+\mathrm{H}_{2} \mathrm{O}+\underset{[\mathrm{y}]}{\mathrm{SO}_{2}} \uparrow\)

Asked in: JEE-TOPICTESTS-CHEMISTRY

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