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Reactivity with Halogens and Hydrogen (Group 2)

Which of the ...

Question

Which of the following process can be used to obtain calcium?

Electrolysis of molten

C a C l_{2}

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Electrolysis of a solution of

C a C l_{2}

in water

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Reduction of

C a C l_{2}

with carbon

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Roasting of lime stone

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Solution

The correct option is A Electrolysis of molten $C a C l_{2}$
During electrolysis of molten calcium chloride, calcium metal is liberated at cathode. Chlorine is obtained at anode. Around 16% of calcium fluoride is also added, which reduces the melting point from 774 $^{o} C$ to 644 $^{o} C$ .

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