24
MCQ (Multiple Correct Answer)
What will happen during the electrolysis of aqueous solution of $\mathrm{CuSO}_4$ in the presence of Cu electrodes?
A
Copper will deposit at cathode
B
Copper will dissolve at anode
C
Oxygen will be released at anode
D
Copper will deposit at anode
25
MCQ (Multiple Correct Answer)
Conductivity $\kappa$, is equal to ............. .
A
$\frac{1}{R} \frac{l}{A}$
B
$\frac{G^*}{R}$
C
$\Lambda_m$
D
$\frac{l}{A}$
26
MCQ (Multiple Correct Answer)
Molar conductivity of ionic solution depends on ........... .
A
temperature
B
distance between electrodes
C
concentration of electrolytes in solution
D
surface area of electrodes
27
MCQ (Multiple Correct Answer)
For the given cell, $\mathrm{Mg}\left|\mathrm{Mg}^{2+} \| \mathrm{Cu}^{2+}\right| \mathrm{Cu}$
A
Mg is cathode
B
Cu is cathode
C
The cell reaction is $\mathrm{Mg}+\mathrm{Cu}^{2+} \longrightarrow \mathrm{Mg}^{2+}+\mathrm{Cu}$
D
Cu is the oxidising agent
28
Subjective
Can absolute electrode potential of an electrode be measured?
Explanation
No, only the difference in potential between two electrodes can be measured. This is due to the reason that oxidation or reduction cannot occur alone. So, when we measure electrode potential of any electrode we have to take a reference electrode.