12
MCQ (Single Correct Answer)
Use the data of $Q .8$ and find out the most stable oxidised species.
A
$\mathrm{Cr}^{3+}$
B
$\mathrm{MnO}_4^{-}$
C
$\mathrm{Cr}_2 \mathrm{O}_7^{2-}$
D
$\mathrm{Mn}^{2+}$
13
MCQ (Single Correct Answer)
The quantity of charge required to obtain one mole of aluminium from $\mathrm{Al}_2 \mathrm{O}_3$ is ............. .
A
1 F
B
6 F
C
3 F
D
2 F
14
MCQ (Single Correct Answer)
The cell constant of a conductivity cell ............ .
A
changes with change of electrolyte
B
changes with change of concentration of electrolyte
C
changes with temperature of electrolyte
D
remains constant for a cell
15
MCQ (Single Correct Answer)
While charging the lead storage battery ............ .
A
$\mathrm{PbSO}_4$ anode is reduced to Pb
B
$\mathrm{PbSO}_4$ cathode is reduced to Pb
C
$\mathrm{PbSO}_4$ cathode is oxidised to Pb
D
$\mathrm{PbSO}_4$ anode is oxidised to $\mathrm{PbO}_2$
16
MCQ (Single Correct Answer)
$\Lambda_{\mathrm{m}\left(\mathrm{NH}_4 \mathrm{OH}\right)}^{\circ}$ is equal to ................ .
A
$\Lambda_{m\left(\mathrm{NH}_4 \mathrm{OH}\right)}^{\circ}+\Lambda_{m\left(\mathrm{NH}_4 \mathrm{Cl}\right)}^{\circ}-\Lambda_{(\mathrm{HCl})}^{\circ}$
B
$\Lambda_{m\left(\mathrm{NH}_4 \mathrm{Cl}\right)}^{\circ}+\Lambda_{m(\mathrm{NaOH})}^{\circ}-\Lambda_{(\mathrm{NaCl})}^{\circ}$
C
$\Lambda_{m\left(\mathrm{NH}_4 \mathrm{Cl}\right)}^{\circ}+\Lambda_{m(\mathrm{NaCl})}^{\circ}-\Lambda_{(\mathrm{NaOH})}^{\circ}$
D
$\Lambda_{m(\mathrm{NaOH})}^{\circ}+\Lambda_{m(\mathrm{NaCl})}^{\circ}-\Lambda_{\left(\mathrm{NH}_4 \mathrm{Cl}\right)}^{\circ}$