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InterviewSolution
| 1. |
A colloid is formed by adding FeCL_(3) in excess of hot water. What will happen if excess of sodium chloride is added to this colloid ? |
| Answer» SOLUTION :On ADDING `FeCl_(3)` to WATER, a colloidal sol of hydrate ferric oxide is formed which carries +ve charge due to adsorption of `FE^(3+)` ions on its surface. On adding `NACL, Cl^(-)` ions bring about coagulation of the sol. | |