Chemistry · 2026
JEE Main · 5 April 2026, Shift 2 · Q70
A paper dipped in a dil. H_2 SO_4 solution of ' X ' upon treatment with SO_2 gas turns into green. The compound ' X ' is:
A paper dipped in a dil. $\displaystyle \mathrm{H}_2 \mathrm{SO}_4$ solution of ' $\displaystyle X$ ' upon treatment with $\displaystyle \mathrm{SO}_2$ gas turns into green. The compound ' $\displaystyle X$ ' is :
Official answer
From NTA’s final answer key for this paper.
(4)
$\displaystyle \mathrm{K}_2 \mathrm{Cr}_2 \mathrm{O}_7$
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JEE Main 2026 Chemistry question, with the answer from NTA’s final answer key. Where our answers come from.