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A strip of metal X is dipped in a blue coloured salt solution YSO4. After some time, a layer of metal Y from the salt solution is formed on the surface of metal strip X.

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A strip of metal X is dipped in a blue coloured salt solution YSO4. 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.

(a) What could metal X be?

(b) What could metal Y be?

(c) Name the metal salt YSO4.

(d) What type of chemical reaction takes place when metal X reacts with salt solution YSO4? Write the equation of the chemical reaction involved.

(e) Name the alloy Z.

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(a) Metal X is Zinc (Zn).

(b) Metal Y is Copper (Cu).

(c) The metal salt YSO4​ is Copper sulphate (CuSO4)

(d) Displacement reaction;

CuSO4 (aq) + Zn(s) → ZnSO4 (aq) + Cu (s)

(e) Brass

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