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  4. When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are

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Q. When chlorine reacts with cold and dilute solution of sodium hydroxide, the products obtained are

AIPMTAIPMT 1998The p-Block Elements - Part2

Solution:

When chlorine reacts with cold and dilute sodium hydroxide, the following reaction takes place:
$2 NaOH + Cl _{2} \longrightarrow NaCl + NaClO + H _{2} O .$
Hence the products are $Cl ^{-}$and $ClO ^{-}$
When chlorine reacts with hot and concentrated sodium hydoxide, the following reaction takes place:
$NaOH + Cl _{2} \longrightarrow 5 NaCl + NaClO _{3}+3 H _{2} O$
Hence the products are $Cl ^{-}$and $ClO _{3}^{-}$