Q.

Which one of the following acts as an antichlor?

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a

MnO2

b

Na2S2O3

c

K2Cr2O7

d

Na2SO4

answer is B.

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Detailed Solution

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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Which one of the following acts as an antichlor?