Assertion : `Fe^(3+)` ions can be used for the coagulation of `As_(2)S_(3)` sol.
Reason : `Fe^(3+)` ions react with `As_(2)S_(3)` give `Fe_(2)S_(3).`

Options

A. if both Assertion and Reason are true and reason is the correct explanation of the assertion.
B. if both assertion and reason are true but reason is not the correct expalanation of the assertion
C. if assertion is true, reason is false
D. both assertion and reason are false statements.

Answer

c

Explanation

When oppositely charged sols are mixed in almost equal proportions, their charges are neutralised. Both sols amy be partially or completely. Precipitated. When negatively charged `As_(2)S_(3)` sol is added to possitively charged `Fe(OH)_(3)` sol, in suitable amounts precipitation of both the sols take place simultenously.