Q74 / 180 · NEET 2017 · Chemistry

Name the gas that can readily decolourise acidified ${KMnO}_{4}$ solution.

A
${CO}_{2}$
Correct answer
B
${SO}_{2}$
C
${NO}_{2}$
D
$P_{2} O_{5}$

Solution

${SO}_{2}$ readily decolourises acidified ${KMnO}_{4} .$

$K \overset{+ 7}{Mn} O_{4} + \overset{+ 4}{S} O_{2} \to \underset{Colourless}{{MnSO}_{4}} + H_{2} {SO}_{4} + K_{2} {SO}_{4}$

Potassium permagnate gives the colouless solution with sulphurdioxide.

Hence, the correct answer is option: 'B'.

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Name the gas that can readily decolourise acidified KMnO4 solution.

Solution

Relevant Questions

Name the gas that can readily decolourise acidified ${KMnO}_{4}$ solution.