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Which one of the following acts as an antichlor?

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a
MnO2
b
Na2S2O3
c
K2Cr2O7
d
Na2SO4

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detailed solution

Correct option is B

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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