JEE Main Chemistry question

In the Down's cell KCl is added to NaCl to:

(A)Lower its m.p.Correct
(B)Dissolve more NaCl
(C)Increase conductivity
(D)Increase the dissociation

Answer: (A)

Solution

KCl (along with /KF in various formulations) is added to the NaCl electrolyte in Down's cell primarily to lower the melting point of the mixture, making large-scale electrolysis of the molten salt practically feasible at a lower operating temperature. It is not added to

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Question ID VK-137769