First slide

Alkaline earth metals

Question

Which one of the following processes is/are not used for the manufacture of calcium?

Moderate

A

Reduction of CaO with carbon
B

Reduction of CaO with hydrogen
C

Electrolysis of a mixture of anhydrous CaCl₂
D

Electrolysis of molten Ca(OH)₂

Solution

calcium oxide on reduction with carbon or hydrogen forms calcium which further reacts to form calcium carbides, calcium hydrides

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