Question

Aqueous solution of cupric chloride forms a deep blue solution on addition of ______.

Options

• dropwise sodium hydroxide

• excess sodium hydroxide

• dropwise ammonium hydroxide

• excess ammonium hydroxide

Answer 1

Aqueous solution of cupric chloride forms a deep blue solution on addition of excess ammonium hydroxide.

Explanation:

Cupric chloride first forms a light blue precipitate with ammonium hydroxide, which dissolves in excess NH₄OH to form a deep blue solution of the tetraamminecopper(II) complex.