Question

(a) Barium chloride reacts with aluminium sulphate to give aluminium chloride and barium

sulphate.

(i) State the type of reaction.

(ii) Translate the above statement into a balanced chemical equation.

(b) A metal ‘X’ acquires a green colour coating on its surface on exposure to air.

(i) Identify the metal ‘X’ and name the process responsible for this change.

(ii) Name and write the chemical formula of the green colour coating formed on the surface

of the metal​

Answer 1

Answer:

Answer a) 1) Double displacement reaction

2) BaCl + AlSo4 = AlCl + BaSo4

Answer b) 1) Metal is copper .

2) This process is called corrosion of copper.

3) CuCo3.Cu (OH)2