Question

$\text{Statement I:}$ When copper rod is placed in aqueous solution of $AgN{O}_3$, the solution turns blue in colour.
$\text{Statement II:}$ Intensity of blue colour increases when zinc rod is placed in aqueous solution of $CuS{O}_4$.
In the light of above statements, choose the correct option below

• A. Statement I incorrect and statement II is correct
• B. Both the statements I and statement II are correct
• C. Both the statements I and statement II are incorrect
• D. Statement I is correct and Statement II is incorrect

Answer 1

The correct option is D Statement I is correct and Statement II is incorrect

Answer (1)
$\bullet$ Blue colour appeared when $Cu$ rod is placed in $AgN{O}_3$ due to oxidation of $Cu$ into $C{u}^{2+}.$
$\bullet$ Intensity of blue colour decreased when $Zn$ rod is placed in $CuS{O}_4(aq.)$ due to the reduction of $C{u}^{2+}$ into $Cu.$