| Assertion : For the coagulation of sols carrying positive charge, \[PO_{4}^{3-}\] ions are more efficient than \[SO_{4}^{2-}\]or \[C{{l}^{-}}\]ions. |
| Reason : This follows Hardy ? Schulze rule. |
A) If both assertion and reason are true and the reason is the correct explanation of the assertion.
B) If both assertion and reason are true but reason is not the correct explanation of the assertion.
C) If assertion is true but reason is false.
D) If the assertion and reason both are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
Both assertion and reason are true and reason is the correct explanation of assertion. According to Hardy ? Schulze rule : Coagulating power of an electrolyte is directly proportional to the fourth power of the valency of the ions causing coagulation.
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