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Question

In the reaction between Cl2 and hot conc. NaOH, which is correct?

A
The oxidation number of Cl2 changes from 0 to +5 and 0 to -1.
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B
Cl2 undergoes disproportionation.
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C
Cl2 undergoes self or auto redox change.
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D
All of these.
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Solution

The correct option is D All of these.
With hot concentrated alkali solutions it forms chlorates.
6NaOH+3Cl25NaCl+NaClO3+3H2O
0 -1 +5

Cl2 undergoes disproportionation.

Hence,option D is correct.

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