Question

Assertion: Copper sulphate solution can be stored in a zinc vessel.
Reason: $E_{C{u}^{2+}|Cu}^{\ominus }=0.34V,E_{Z{n}^{2+}|Zn}^{\ominus }=-0.76V$,
$E_{A{g}^{\oplus }|Ag}^{\ominus }=0.80V$

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
• C. Assertion is true but Reason is false
• D. Assertion is false but Reason is true
• E. Both Assertion and Reason are false

Answer 1

The correct option is D Assertion is false but Reason is true

Cell representation would be $Zn|Z{n}^{2+}||C{u}^{2+}|Cu$

$\therefore E_{cell}^{\ominus }=(E_{red}^{\ominus }{)}_c-(E_{red}^{\ominus }{)}_a$

$=0.34-(-0.76)=1.10V$

Since $E_{cell}^{\ominus }$ is +ve, so $CuS{O}_4$ solution cannot be stored in $Zn$ vessel.

Here $Cu$ ions will be replaced by $Zn$.