First slide

Group-17 or Halogen family

Question

Which of the following is used in the preparation of chlorine

Moderate

A

Only MnO₂
B

Only KMnO₄
C

Both MnO₂ and KMnO₄
D

Either MnO₂ or KMnO₄

Solution

$\begin{array}{l} {MnO}_{2} + 4 HCl \to {MnCl}_{2} + 2 H_{2} O + {Cl}_{2} . \\ 2 {KMnO}_{4} + 3 H_{2} {SO}_{4} + 10 HCl \to K_{2} {SO}_{4} + 2 {MnSO}_{4} + 8 H_{2} O + 5 {Cl}_{2} \end{array}$

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