During the qualitative analysis of SO₃²⁻ using dilute H₂ SO₄, SO₂ gas is evolved which turns K₂ Cr₂ O₇ solution (acidified with dilute H₂ SO₄):

d- and f-Block Elements: JEE Main 2023 Chemistry question

JEE Main 2023 · 30 Jan, Morning shift · Q784

JEE Main 202330 Jan, Morning shiftChemistryEasyd- and f-Block Elements158× since 2002

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}

) :

JEE Main 2023 d- and f-Block Elements Question with Solution (30 Jan Morning shift, Q784) | JEE Arc