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Question

The reaction of Cl2 gas with cold dilute and hot concentrated NaOH in water give sodium salt of two (different) oxoacids of chlorine P and Q respectively. The Cl2 gas reacts with SO2 gas, in presence of charcoal to give a product R. R reacts with white phosphorous to give a compound S. On hydrolysis, S gives as oxoacid of phosphorous T.
P and Q, respectively, are the sodium salts of:

A
Hypochlorus and chloric acid
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B
Hypochlorus and chlorus acid
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C
Chloric and perchloric acids
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D
Chloric and hypochlorus acids.
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Solution

The correct option is A Hypochlorus and chloric acid
Cl2+2NaOH(dil.and cold)NaCl+NaOCl+H2O
5Cl2+6NaOH(conc.and hot)5NaCl+NaClO3+3H2O

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