A sample of SO2 is bubbled through acidified KMnO4 solution until 100 mL of 0.200 M KMnO4 is just decolourised (5SO2 + 2MnO4- + 2H2O -> 5SO4^2- + 2Mn^2+ + 4H+). The volume of SO2 at STP (22.4 L/mol) absorbed is

JEE Advanced levelSingle correct optionDifficulty 3 of 3pn091

A sample of $SO X_{2}$ is bubbled through acidified $KMnO X_{4}$ solution until 100 mL of 0.200 M $KMnO X_{4}$ is just decolourised ( $5 SO X_{2} + 2 MnO X_{4} X^{-} + 2 H X_{2} O 5 SO X_{4} X^{2 -} + 2 Mn X^{2 +} + 4 H X^{+}$ ). The volume of $SO X_{2}$ at STP (22.4 L/mol) absorbed is

Moles

MnO X_{4} X^{-}

0.200 \times 0.100 = 0.0200

. From the equation moles

SO X_{2}

0.0200 \times 5/2 = 0.0500

. Volume =

0.0500 \times 22.4 = 1.12