Electrochemistry Quiz 5

Question 1

In hydrogen-oxygen fuel cell, the carbon rods are immersed in hot aqueous solution of

Accepted Answer

KOH

Answer

KCl

Answer

$H_2 SO_4$

Answer

$NH_4 Cl$

Question 2

The emf of cell is 1.3 volt. The positive electrode has potential of 0.5 volt. The potential of negative electrode is

Accepted Answer

-0.8 V

Answer

0.8 V

Answer

1.8 V

Answer

&ndash; 1.8 V

Question 3

The electrode potential of a silver electrode dipped in $0.1 M \ AgNO_3$ solution at 298 K is ($E^0{_{red}}$  of Ag = 0.80 volt)

Accepted Answer

0.741 V

Answer

0.0741 V

Answer

0.0591 V

Answer

0.859 V

Question 4

Which of the following species gains electrons more easily ?

Accepted Answer

$H^+$

Answer

$Na^+$

Answer

$Mg^+$

Answer

$Hg^+$

Question 5

In Nernst equation the constant 0.0592 at 298 K represents the value of

Accepted Answer

$\frac{2.303 \ RT}{F}$

Answer

$\frac{RT}{nF}$

Answer

$\frac{RT}{F}$

Answer

$\frac{2.303 \ RT}{nF}$

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