Consider the half reaction, $S^{- 2} \overset{H^{+}}{\to} {SO}_{2}$ the number of water molecules involved in the balanced half reaction is/are

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answer is C.

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Detailed Solution

$Balancing oxygen S^{- 2} + 2 H_{2} O \to {SO}_{2}; Balancing hydrogen S^{- 2} + 2 H_{2} O \to {SO}_{2} + 4 H^{+}; Balancing charge S^{- 2} + 2 H_{2} O \to {SO}_{2} + 4 H^{+} + 6 e;$

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