Question

Which of the following is a double salt?

Options

• Carnallite

• Mohr's salt

• Alum

• All are correct

Answer 1

All are correct

Explanation:

• Carnalite: KCl.MgCl₂.6H₂O
• Mohr's salt: FeSO₄.(NH₄)₂SO₄.6H₂O
• Alum: K₂SO₄.Al₂(SO₄)₃.24H₂O

So, all are double salts.