WBJEE · Chemistry · Practical Chemistry
\([X]+\) dil. \(\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow[Y]:\)
Colourless, suffocating gas
\([Y]+\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\)
Green colouration of solution
Then, \([X]\) and \([Y]\) are
- A \(\mathrm{SO}_{3}^{2-}, \mathrm{SO}_{2}\)
- B \(\mathrm{Cl}^{-}, \mathrm{HCl}\)
- C \(\mathrm{S}^{2-}, \mathrm{H}_{2} \mathrm{S}\)
- D \(\mathrm{CO}_{3}^{2-}, \mathrm{CO}_{2}\)
Answer & Solution
Correct Answer
(A) \(\mathrm{SO}_{3}^{2-}, \mathrm{SO}_{2}\)
Step-by-step Solution
Detailed explanation
According to question, \([X]+\) Dil. \(\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow[\mathrm{Y}]:\) Colourless, suffocating gas \([Y]+\mathrm{K}_{2} \mathrm{Cr} \mathrm{O}_{7}+\mathrm{H}_{2} \mathrm{SO}_{4} \longrightarrow\) Green colouration of solution. All sulphites when…
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