What is iso-electric point of colloids ?

What is isoelectric point of colloids?

At iso-electric point :

At iso-electric point:

What do you understand by "isoelectric point" of a colloid ?

Assertion:Isoelectric point is the pH at which colloidal particles can move towards either of the electrodes. Reason: At the isoelectric point, colloidal particles became electrically neutral.

Which among the following is not and electrical property of colloids?

What is colloid ?