Question

Assertion : When $KI$ solution is added to $AgNO_{3}$ solution, negatively charged sol results.
Reason: Negative charge of sol is due to preferential adsorption of iodide ions from the dispersion medium.

• A. If both assertion and reason are true and reason is the correct explanation of assertion.
• B. If both assertion and reason are true but reason is not the correct explanation of assertion
• C. If assertion is true but reason is false.
• D. If both assertion and reason are false.

Answer 1

Answer: (D)

When $KI$ solution is added to $AgNO_{3}$ solution, positively charged sol results due to adsorption of $Ag^{+}$ ions from dispersion medium.
$Agl/Ag^{+}$
Positively charged