Bromine is liberated when an aqueous solution of potassium bromide is treated with

Bromine is liberated when an aqueous solution of potassium bromide is treated with
  1. $\mathrm{Cl}_{2}$
  2. $\mathrm{I}_{2}$
  3. Dilute $\mathrm{H}_{2} \mathrm{SO}_{4}$
  4. $\mathrm{SO}_{2}$

Solution

$$
\mathrm{Cl}_{2}+2 \mathrm{KBr} ightarrow 2 \mathrm{KCl}+\mathrm{Br}_{2}
$$
A more electronegative halogen can displace less electronegative halogen. ,

Asked in: JEE-TOPICTESTS-CHEMISTRY

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