Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg (b) Hg and Mg (c) Na and Mg (d) Cu and Fe

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Solution

Answer :

(c) Na and Mg
Sodium (Na) and magnesium (Mg) are highly reactive metals. They are not easily reduced by carbon and aluminium. Thus, they are extracted by electrolytic reduction or electrolysis of their molten chlorides (sodium chloride, NaCl, and magnesium chloride, $M g C l_{2}$ ).

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$P b, A u, M g, S n, F e, A l, A g, H g, N a, Z n, C u, C a$

Question 18
Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) $Na$
(ii) $Ca$
(iii) $Fe$
(iv) $Cu$

(a) (i) and (iv)
(b) (iii) and (iv)
(c) (i) and (iii)
(d) (i) and (ii)

Q. Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i)

N a

(ii)

C a

(iii)

F e

(iv)

C u

Q. The order of reactivity of metals is
(a) K > Na > Ca > Au
(b) K > Ca > Na > Mg
(c) Fe > Na > Mg > Au
(d) Cu > Fe > K > Na

Q. Which of the following metals are obtained by electrolysis of their chlorides in molten state?
(i) Na
(ii) Ca
(iii) Fe
(iv) Cu

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Which of the following metals are extracted by the electrolysis of their molten chlorides? (a) Na and Hg (b) Hg and Mg (c) Na and Mg (d) Cu and Fe

Answer : (c) Na and Mg Sodium (Na) and magnesium (Mg) are highly reactive metals. They are not easily reduced by carbon and aluminium. Thus, they are extracted by electrolytic reduction or electrolysis of their molten chlorides (sodium chloride, NaCl, and magnesium chloride, MgCl2).

Which of the following metals are extracted by the electrolysis of their molten chlorides?
(a) Na and Hg (b) Hg and Mg (c) Na and Mg (d) Cu and Fe

Answer :

(c) Na and Mg
Sodium (Na) and magnesium (Mg) are highly reactive metals. They are not easily reduced by carbon and aluminium. Thus, they are extracted by electrolytic reduction or electrolysis of their molten chlorides (sodium chloride, NaCl, and magnesium chloride, $M g C l_{2}$ ).