Electrolytic Cells
CHXII03:ELECTROCHEMISTRY

330251 When \({\rm{0}}{\rm{.1}}\,\,{\rm{mol}}\,\,{\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\) is oxidised the quantity of electricity required to completely oxidise \({\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\,\,{\rm{to}}\,\,{\rm{MnO}}_{\rm{4}}^{\rm{ - }}\) is

1 \({\rm{2 \times 96500C}}\)
2 \({\rm{9650}}\,\,{\rm{C}}\)
3 \({\rm{96500}}\,\,{\rm{C}}\)
4 \({\rm{96}}{\rm{.50}}\,\,{\rm{C}}\)
CHXII03:ELECTROCHEMISTRY

330252 \(\mathrm{M}^{n+}\) solution was electrolysed for \(75 \mathrm{~min}\) by a current of \(0.30 \mathrm{~A}\). Mass of the metal \(\mathrm{M}\) deposited at the cathode was \(0.958 \mathrm{~g}\). \(\mathrm{M}^{n+}\) contains 68 protons and 69 neutrons. What is the value of \(n\) ?

1 3
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

330253 The equivalent conductance of two strong electrolytes at infinite dilution in \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) (where ions move freely through a solution) at \({\rm{2}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) are given below:
\({\rm{\Lambda }}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COONa}}}^{\rm{o}}{\rm{ = 91}}{\rm{.0}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
\({\rm{\Lambda }}_{{\rm{HCl}}}^{\rm{o}}{\rm{ = 426}}{\rm{.2}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
What additional information/quantity one needs to calculate \({{\rm{\Lambda }}^{\rm{o}}}\) of an aqueous solution of acetic acid?

1 The limiting equivalent conductance of \({{\rm{H}}^{\rm{ + }}}\left( {{\rm{\lambda }}_{{{\rm{H}}^{\rm{ + }}}}^{\rm{o}}} \right)\)
2 \({{\rm{\Lambda }}^{\rm{o}}}\) of NaCl
3 \({{\rm{\Lambda }}^{\rm{o}}}\) of chloroacetic acid \(\left( {{\rm{ClC}}{{\rm{H}}_{\rm{2}}}{\rm{COOH}}} \right)\)
4 \({{\rm{\Lambda }}^{\rm{o}}}\) of \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOK}}\)
CHXII03:ELECTROCHEMISTRY

330254 How many Faradays of electricity are required to deposit 10 g of calcium from molten calcium chloride using inert electrodes?
(Molar mass of calcium \({\rm{ = 40g}}\,\,{\rm{mo}}{{\rm{l}}^{ - 1}}\))

1 0.5 F
2 1 F
3 0.25 F
4 2 F
CHXII03:ELECTROCHEMISTRY

330251 When \({\rm{0}}{\rm{.1}}\,\,{\rm{mol}}\,\,{\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\) is oxidised the quantity of electricity required to completely oxidise \({\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\,\,{\rm{to}}\,\,{\rm{MnO}}_{\rm{4}}^{\rm{ - }}\) is

1 \({\rm{2 \times 96500C}}\)
2 \({\rm{9650}}\,\,{\rm{C}}\)
3 \({\rm{96500}}\,\,{\rm{C}}\)
4 \({\rm{96}}{\rm{.50}}\,\,{\rm{C}}\)
CHXII03:ELECTROCHEMISTRY

330252 \(\mathrm{M}^{n+}\) solution was electrolysed for \(75 \mathrm{~min}\) by a current of \(0.30 \mathrm{~A}\). Mass of the metal \(\mathrm{M}\) deposited at the cathode was \(0.958 \mathrm{~g}\). \(\mathrm{M}^{n+}\) contains 68 protons and 69 neutrons. What is the value of \(n\) ?

1 3
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

330253 The equivalent conductance of two strong electrolytes at infinite dilution in \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) (where ions move freely through a solution) at \({\rm{2}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) are given below:
\({\rm{\Lambda }}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COONa}}}^{\rm{o}}{\rm{ = 91}}{\rm{.0}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
\({\rm{\Lambda }}_{{\rm{HCl}}}^{\rm{o}}{\rm{ = 426}}{\rm{.2}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
What additional information/quantity one needs to calculate \({{\rm{\Lambda }}^{\rm{o}}}\) of an aqueous solution of acetic acid?

1 The limiting equivalent conductance of \({{\rm{H}}^{\rm{ + }}}\left( {{\rm{\lambda }}_{{{\rm{H}}^{\rm{ + }}}}^{\rm{o}}} \right)\)
2 \({{\rm{\Lambda }}^{\rm{o}}}\) of NaCl
3 \({{\rm{\Lambda }}^{\rm{o}}}\) of chloroacetic acid \(\left( {{\rm{ClC}}{{\rm{H}}_{\rm{2}}}{\rm{COOH}}} \right)\)
4 \({{\rm{\Lambda }}^{\rm{o}}}\) of \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOK}}\)
CHXII03:ELECTROCHEMISTRY

330254 How many Faradays of electricity are required to deposit 10 g of calcium from molten calcium chloride using inert electrodes?
(Molar mass of calcium \({\rm{ = 40g}}\,\,{\rm{mo}}{{\rm{l}}^{ - 1}}\))

1 0.5 F
2 1 F
3 0.25 F
4 2 F
CHXII03:ELECTROCHEMISTRY

330251 When \({\rm{0}}{\rm{.1}}\,\,{\rm{mol}}\,\,{\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\) is oxidised the quantity of electricity required to completely oxidise \({\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\,\,{\rm{to}}\,\,{\rm{MnO}}_{\rm{4}}^{\rm{ - }}\) is

1 \({\rm{2 \times 96500C}}\)
2 \({\rm{9650}}\,\,{\rm{C}}\)
3 \({\rm{96500}}\,\,{\rm{C}}\)
4 \({\rm{96}}{\rm{.50}}\,\,{\rm{C}}\)
CHXII03:ELECTROCHEMISTRY

330252 \(\mathrm{M}^{n+}\) solution was electrolysed for \(75 \mathrm{~min}\) by a current of \(0.30 \mathrm{~A}\). Mass of the metal \(\mathrm{M}\) deposited at the cathode was \(0.958 \mathrm{~g}\). \(\mathrm{M}^{n+}\) contains 68 protons and 69 neutrons. What is the value of \(n\) ?

1 3
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

330253 The equivalent conductance of two strong electrolytes at infinite dilution in \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) (where ions move freely through a solution) at \({\rm{2}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) are given below:
\({\rm{\Lambda }}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COONa}}}^{\rm{o}}{\rm{ = 91}}{\rm{.0}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
\({\rm{\Lambda }}_{{\rm{HCl}}}^{\rm{o}}{\rm{ = 426}}{\rm{.2}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
What additional information/quantity one needs to calculate \({{\rm{\Lambda }}^{\rm{o}}}\) of an aqueous solution of acetic acid?

1 The limiting equivalent conductance of \({{\rm{H}}^{\rm{ + }}}\left( {{\rm{\lambda }}_{{{\rm{H}}^{\rm{ + }}}}^{\rm{o}}} \right)\)
2 \({{\rm{\Lambda }}^{\rm{o}}}\) of NaCl
3 \({{\rm{\Lambda }}^{\rm{o}}}\) of chloroacetic acid \(\left( {{\rm{ClC}}{{\rm{H}}_{\rm{2}}}{\rm{COOH}}} \right)\)
4 \({{\rm{\Lambda }}^{\rm{o}}}\) of \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOK}}\)
CHXII03:ELECTROCHEMISTRY

330254 How many Faradays of electricity are required to deposit 10 g of calcium from molten calcium chloride using inert electrodes?
(Molar mass of calcium \({\rm{ = 40g}}\,\,{\rm{mo}}{{\rm{l}}^{ - 1}}\))

1 0.5 F
2 1 F
3 0.25 F
4 2 F
CHXII03:ELECTROCHEMISTRY

330251 When \({\rm{0}}{\rm{.1}}\,\,{\rm{mol}}\,\,{\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\) is oxidised the quantity of electricity required to completely oxidise \({\rm{MnO}}_{\rm{4}}^{{\rm{2 - }}}\,\,{\rm{to}}\,\,{\rm{MnO}}_{\rm{4}}^{\rm{ - }}\) is

1 \({\rm{2 \times 96500C}}\)
2 \({\rm{9650}}\,\,{\rm{C}}\)
3 \({\rm{96500}}\,\,{\rm{C}}\)
4 \({\rm{96}}{\rm{.50}}\,\,{\rm{C}}\)
CHXII03:ELECTROCHEMISTRY

330252 \(\mathrm{M}^{n+}\) solution was electrolysed for \(75 \mathrm{~min}\) by a current of \(0.30 \mathrm{~A}\). Mass of the metal \(\mathrm{M}\) deposited at the cathode was \(0.958 \mathrm{~g}\). \(\mathrm{M}^{n+}\) contains 68 protons and 69 neutrons. What is the value of \(n\) ?

1 3
2 2
3 1
4 4
CHXII03:ELECTROCHEMISTRY

330253 The equivalent conductance of two strong electrolytes at infinite dilution in \({{\rm{H}}_{\rm{2}}}{\rm{O}}\) (where ions move freely through a solution) at \({\rm{2}}{{\rm{5}}^{\rm{^\circ }}}{\rm{C}}\) are given below:
\({\rm{\Lambda }}_{{\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COONa}}}^{\rm{o}}{\rm{ = 91}}{\rm{.0}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
\({\rm{\Lambda }}_{{\rm{HCl}}}^{\rm{o}}{\rm{ = 426}}{\rm{.2}}\,\,{\rm{S}}{\mkern 1mu} {\mkern 1mu} {\rm{c}}{{\rm{m}}^{\rm{2}}}{\mkern 1mu} {\mkern 1mu} {\rm{/}}{\mkern 1mu} {\mkern 1mu} {\rm{equiv}}\)
What additional information/quantity one needs to calculate \({{\rm{\Lambda }}^{\rm{o}}}\) of an aqueous solution of acetic acid?

1 The limiting equivalent conductance of \({{\rm{H}}^{\rm{ + }}}\left( {{\rm{\lambda }}_{{{\rm{H}}^{\rm{ + }}}}^{\rm{o}}} \right)\)
2 \({{\rm{\Lambda }}^{\rm{o}}}\) of NaCl
3 \({{\rm{\Lambda }}^{\rm{o}}}\) of chloroacetic acid \(\left( {{\rm{ClC}}{{\rm{H}}_{\rm{2}}}{\rm{COOH}}} \right)\)
4 \({{\rm{\Lambda }}^{\rm{o}}}\) of \({\rm{C}}{{\rm{H}}_{\rm{3}}}{\rm{COOK}}\)
CHXII03:ELECTROCHEMISTRY

330254 How many Faradays of electricity are required to deposit 10 g of calcium from molten calcium chloride using inert electrodes?
(Molar mass of calcium \({\rm{ = 40g}}\,\,{\rm{mo}}{{\rm{l}}^{ - 1}}\))

1 0.5 F
2 1 F
3 0.25 F
4 2 F
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