Q10 / 213 · NTA Abhyas (NEET) 2020 · Chemistry · s Block Elements

Metallic magnesium is obtained by

A
Reduction of MgO with coke
B
Electrolysis of an aqueous solution of $M g C l_{2}$
Correct answer
C
Electrolysis of molten $M g C l_{2}$
D
Displacement of magnesium by iron from $M g C l_{2}$ solution

Solution

Metallic magnesium is obtained at cathode by Electrolysis of an molten mass of

M g C l_{2}

as follows

M g C l_{2} \to M g^{2 +} + 2 C l^{-}

At cathode

M g^{2 +} + 2 e^{-} \to M g

Hence, the correct answer is option: 'C'.

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