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Q.

A strip of metal X is dipped in a blue-coloured salt solution ${YSO}_{4}$ . After some time, a layer of metal Y from the salt solution is formed on the surface of metal strip X. Metal X is used in galvanisation whereas metal Y is used in making electric wires. Metal X and metal Y together form an alloy Z. Which of the following could be metal X?

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a

Copper

b

Zinc

c

Aluminium

d

Magnesium

answer is B.

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Detailed Solution

Metal X given in the reaction is zinc.
Metal X is more reactive, and hence it displaces the metal Y from the solution. Zinc metal is used in the process of galvanisation, which involves the protection of iron surfaces from corrosion. The reaction of the metal X in the solution of YSO4 is as follows:
X(s) + YSO4(aq) → XSO4(aq) + Y(s)

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