KCET 2021 Chemistry Solved Paper

The amount of electrolyte required to coagulate the given colloid is in order
NaCl>BaCl2<AlCl3
Because as colloids move towards anode they must be negatively charge.
According to Hardy Schulze rule,
Coagulation value
∝

1

Coagulating‌power(Charge‌an‌electrolyte)

The charge on the electrolyte; Na+,Ba2+ and Al3+ are 1, 2 and 3 respectively.