When an excess electrolyte is added to a colloidal sol it
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a
Gets coagulated
b
Is ionised
c
Becomes stable
d
Gets purified
answer is A.
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Detailed Solution
Colloids are charged. charge of colloid can be destroyed by adding excess electrolyte. the oppositely charged ion of the electolyte (floculating ion) neutralizes the charge of colloid. Coagulation of colloid occur.