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  • The positive value of the standard electrode potential of \frac{Cu^{2+}}{Cu} indicates that ____________.

The positive value of the standard electrode potential of {Cu^{2+} / Cu indicates that ____________.

(i) this redox couple is a stronger reducing agent than the {H^{+}/{H_{2}} couple.

(ii) this redox couple is a stronger oxidising agent than {H^{+}/{H_{2}}.

(iii) Cu can displace H_{2} from acid.

(iv) Cu cannot displace H_{2} from acid.

Answers (1)

The answer is the option (ii, iv) Decrease in E° indicates an increase in reducing power

\\Cu^{2+}+2e^-\rightarrow Cu ; \; E^0=0.34V\\ 2H^++2e^-\rightarrow H_2 ;\; E^0=0.00V

As, E° value for Cu^{2+}is higher -

(i) It is the stronger oxidizing agent

(ii) It can't displace H_{2}

 

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