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JEE Main levelSingle correct optionDifficulty 2 of 3ph016

Chlorine gas is passed through a hot concentrated solution of $NaOH$ . The products containing chlorine are

A $NaCl$ and $NaClO X_{3}$
B $NaCl$ and $NaOCl$
C $NaCl$ and $NaClO X_{4}$
D $NaClO X_{2}$ and $NaClO X_{3}$

Answer: A

In hot concentrated alkali the hypochlorite first formed disproportionates further:

3 Cl X_{2} + 6 NaOH 5 NaCl + NaClO X_{3} + 3 H X_{2} O

. The cold dilute reaction gives

NaCl

and

NaOCl

.

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