Question

In the coagulation of a positive sol, the flocculating power of the ions \(PO_4^{3-}\), \(SO_4^{2-}\) and \(Cl^-\) decreases in the order

• A. \(PO_4^{3-} > Cl^- > SO_4^{2-}\)
• B. \(PO_4^{3-} > SO_4^{2-} > Cl^-\)
• C. \(Cl^- > SO_4^{2-} > PO_4^{3-}\)
• D. \(Cl^- > PO_4^{3-} > SO_4^{2-}\)
• E. \(SO_4^{2-} > PO_4^{3-} > Cl^-\)

Hint:

For coagulation, higher valency of the oppositely charged ion means greater flocculating power.

Answer 1

The Correct Option is B