Question

Assertion: Copper liberates hydrogen from a solution of dilute hydrochloric acid.
Reason: Hydrogen is below copper in the electrochemical series.

• A. If both Assertion and Reason are true and the Reason is a correct explanation of the Assertion
• B. If both Assertion and Reason are true but Reason is not a correct explanation of the Assertion
• C. If Assertion is true but the Reason is false
• D. If both Assertion and Reason are false

Answer 1

Answer: (D)

Cu cannot liberate $H_2$ from a solution of dilute HCl as hydrogen is above copper in the electrochemical series.

$E^{\circ}_{\,\,H^{+}/½H_{2}} = \pm \,0.00$

$E^{\circ}_{\,\,Cu^{2+} /Cu} = +0.34$