Assertion: Zinc displaces copper from copper sulphate solution. Reason: The E°298 K of Zn is -0.76 V and that of Cu is +0.34 V.

Question

Assertion: Zinc displaces copper from copper sulphate solution. Reason: The E°298 K of Zn is -0.76 V and that of Cu is +0.34 V. (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

Tardigrade Admin · Accepted Answer

Zn(s) + Cu2+(aq) arrow Zn2+(aq) + Cu(s) ECu2+/Cu°=0.34 V, E Zn/Zn°=-0.76 V Higher reduction potential of Cu2+ ion than Zn2+ ion shows that Cu2+ ion has more tendency to undergo reduction.

Q. Assertion : Zinc displaces copper from copper sulphate solution.
Reason : The $E_{298 K}^{\circ}$ of $Z n$ is $- 0.76 V$ and that of $C u$ is $+ 0.34 V$ .

If both assertion and reason are true and reason is the correct explanation of assertion

If both assertion and reason are true but reason is not the correct explanation of assertion

If assertion is true but reason is false

If both assertion and reason are false

$Z n (s) + C u^{2} +_{(a q)} \to Z n^{2} +_{(a q)} + C u_{(s)}$
$E_{C u^{2 +} / C u}^{\circ} = 0.34 V, E_{Z n / Z n}^{\circ} = - 0.76 V$
Higher reduction potential of $C u^{2 +}$ ion than $Z n^{2 +}$ ion shows that $C u^{2 +}$ ion has more tendency to undergo reduction.

Q. Assertion : Zinc displaces copper from copper sulphate solution. Reason : The E298K∘​ of Zn is −0.76V and that of Cu is +0.34V.