On treating a compound with warm dil. H2SO4, gas X is evolved which turns K2Cr2O7 paper acidified with dil. H2SO4 to a green compound Y. X and Y respectively are :
Solution
SO<sub>2</sub> + K<sub>2</sub>Cr<sub>2</sub>O<sub>7</sub> + dil. H<sub>2</sub>SO<sub>4</sub> $\to$ SO<sub>3</sub> + Cr<sub>2</sub>(SO<sub>4</sub>)<sub>3</sub>
(green)
About this question
Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family
This question is part of PrepWiser's free JEE Main question bank. 300 more solved questions on p-Block Elements are available — start with the harder ones if your accuracy is >70%.