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D And F Block Elements

JEE Main 2023 (Online) 30th January Morning Shift

MCQ+4 / -12023

During the qualitative analysis of \(\mathrm{SO}_{3}^{2-}\) using dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}, \mathrm{SO}_{2}\) gas is evolved which turns \(\mathrm{K}_{2} \mathrm{Cr}_{2} \mathrm{O}_{7}\) solution (acidified with dilute \(\mathrm{H}_{2} \mathrm{SO}_{4}\)) :

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