Question

Two metals X and Y form the salts XSO and Y SO , respectively. The solution of salt XSO₄ is blue in colour whereas that of Y₂SO₄ is colourless. When barium chloride solution is added to XSO₄ solution, then a white precipitate Z is formed along with a salt which turns the solution green. And when barium chloride solution is added to Y₂SO₄ solution, then the same white precipitate Z is formed along with colourless common salt solution.

(a) What could the metals X and Y be ? 

(b) Write the name and formula of salt XSO₄ . 

(c) Write the name and formula of salt Y₂SO₄ . 

(d) What is the name and formula of white precipitate Z ? 

(e) Write the name and formula of the salt which turns the solution green in the first case.

Answer 1

(a) Metal X : Copper; Metal Y : Sodium 

(b) Copper sulphate, CuSO₄ 

(c) Sodium sulphate, Na₂SO₄ 

(d) Barium sulphate, BaSO₄ 

(e) Copper chloride, CuCl₂