First slide

Chlorine

Question

Which of the following is used in the preparation of chlorine ?

Easy

A

Only MnO₂
B

Only KMnO₄
C

Both MnO₂ and KMnO₄
D

Either MnO₂ or KMnO₄

Solution

$4 HCl + {MnO}_{2} â {MnCl}_{2} + 2 H_{2} O + {Cl}_{2} 4 NaCl + {MnO}_{2} + 4 H_{2} {SO}_{4} â {MnCl}_{2} + 4 {NaHSO}_{4} + 2 H_{2} O + {Cl}_{2} 16 HCl + 2 {KMnO}_{4} â 2 KCl + 2 {MnCl}_{2} + 8 H_{2} O + 5 {Cl}_{2}$
Bulk isolation of chlorine in commercial scale also involves the oxidation of chloride. In Weldonâs process, pyrolusite mineral (MnO₂) is heated with concentrated hydrochloric acid, to obtain chlorine.

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