Which one of the following acts as an antichlor?

M n O_{2}

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N a_{2} S_{2} O_{3}

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K_{2} C r_{2} O_{7}

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N a_{2} S O_{4}

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Solution

The correct option is B $N a_{2} S_{2} O_{3}$
An antichlor is a substance used to decompose residual HCl or chlorine after chlorine-based bleaching in order to prevent ongoing reactions with, and therefore damage to, the material that has been bleached.

Example: Sodium thiosulphate which is the correct option.

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Similar questions

4 H C l + M n O_{2} \to M n C l_{2} + 2 H_{2} O + C l_{2}

M n O_{2}

M n O_{4}^{-} + 2 H_{2} O + 3 e^{-} ⟶ M n O_{2} + 4 ⊖ O H

2 K C l O_{3} + M n O_{2} + 2 K C l + 3 O_{2} (g) + M n O_{2}

N a_{2} C O_{3} S O_{2} - - \to (A) N a_{2} C O_{3} - ---- \to (B) S \to (C) A g N O_{3} - --- \to (D)

N a_{2} S_{2} O_{3} + 4 C l_{2} + 5 H_{2} O \to N a_{2} S O_{4} + 8 H C l

N a_{2} S_{2} O_{3}

=

N a_{2} S_{2} O_{3}

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