Match column A (process) with column B (electrolyte).

A (process) B (electrolyte)
(I) Downs Cell (W) Fused $M g C l_{2}$
(II) Dow sea water (X) Fused $A l_{2} O_{3} + N a_{3} A l F_{6}$
(III) Hall-Heroult (Y) Fused $K H F_{2}$
(IV) Moissan (Z) Fused 40% NaCl + 60% CaCl $_{2}$
Choose the correct alternative:

I-Z, II-W, III-X, IV-Y

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I-X, II-Y, III-Z, IV-W

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I-W, II-Z, III-X, IV-Y

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I-X, II-Z, III-W, IV-Y

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Solution

The correct option is A I-Z, II-W, III-X, IV-Y
(1) In Downs cell molten $M g C l_{2}$ is electrolyzed, the electrolyte used in the cell is a fused mixture of 40% NaCl and 60% $C a C l_{2}$ .

(II) In Dow process, $M g (O H)_{2}$ is precipitated from sea-water by slurrying with calcined dolomite and then converting it to $M g C l_{2}$ by reacting with HCl. In Dow sea water process, the electrolyte used is fused $M g C l_{2}$ .

(III) In the Hall-Heroult process, the electrolyte used is a fused mixture of $A l_{2} O_{3}$ and $N a_{3} A l F_{6}$ .

(IV) In Moissan process, the electrolyte used is fused $K H F_{2}$ .
The correct match is:
I-Z, II-W, III-X, IV-Y

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A (process)	B (electrolyte)
(I) Downs Cell	(W) Fused $M g C l_{2}$
(II) Dow sea water	(X) Fused $A l_{2} O_{3} + N a_{3} A l F_{6}$
(III) Hall-Heroult	(Y) Fused $K H F_{2}$
(IV) Moissan	(Z) Fused 40% NaCl + 60% CaCl $_{2}$

Match column A (process) with column B (electrolyte). A (process) B (electrolyte) (I) Downs Cell (W) Fused MgCl2 (II) Dow sea water (X) Fused Al2O3+Na3AlF6 (III) Hall-Heroult (Y) Fused KHF2 (IV) Moissan (Z) Fused 40% NaCl + 60% CaCl2Choose the correct alternative: