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Question: Carnallite on electrolysis gives...

Carnallite on electrolysis gives

A

Mg and Cl2\mathrm { Cl } _ { 2 }

B

Ca and Cl2\mathrm { Cl } _ { 2 }

C

K and Cl2\mathrm { Cl } _ { 2 }

D

Al and Cl2\mathrm { Cl } _ { 2 }

Answer

K and Cl2\mathrm { Cl } _ { 2 }

Explanation

Solution

Carnallite is an ore of potassium electrolysis of fused KCl and CaCl2\mathrm { CaCl } _ { 2 } is carried out to obtain potassium.

KCl K++Cl−\mathrm { K } ^ { + } + \mathrm { Cl } ^ { - }

At cathode : K++e−→K\mathrm { K } ^ { + } + \mathrm { e } ^ { - } \rightarrow \mathrm { K }

At anode : 2Cl−→Cl2+2e−2 \mathrm { Cl } ^ { - } \rightarrow \mathrm { Cl } _ { 2 } + 2 \mathrm { e } ^ { - }