Question

Greater being the valency of effective ion, greater is the coagulation power.

• A. True
• B. False
• C. Ambiguous
• D. Data insufficient

Answer 1

The correct option is A True

Hardy- Schulze Law : According to them, the greater the valency of the active ion, greater is the power to cause coagulation. Active ion is responsible for coagulation.
In the case of negatively charged sols ($A{s}_2{S}_3$ is negative sol), the coagulation power is in order of
$A{l}^{+3}>C{a}^{+2}>N{a}^{+}$