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Calcium is obtained by the

1. electrolysis of solution of calcium chloride in water
2. electrolysis of molten anhydrous calcium chloride or fused calcium chloride
3. roasting of limestone
4. reduction of calcium chloride with carbon

Correct answer: electrolysis of molten anhydrous calcium chloride or fused calcium chloride

Solution

Calcium is obtained industrially by the electrolysis of molten anhydrous calcium chloride because it is a highly reactive metal and cannot be extracted by reduction or roasting methods.

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