JEE CHEMISTRY MCQ: PRACTICAL CHEMISTRY

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Analyzing +4 | -1

[x]+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow[y]

a colourless gas with irritating smell,

[{y}]+\mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7+\mathrm{H}_2 \mathrm{SO}_4 \rightarrow

green solution.

[{x}]

and

[y]

are

View answer and explanation

Correct option: A

\mathrm{SO}_3^{2-}, \mathrm{SO}_2

Option B is correct because gold chloride can react with copper, iron, nickel, chromium, zinc, or tin due to gold's high reduction potential, but the reason given is irrelevant.

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