Electrolytic Cells
CHXII03:ELECTROCHEMISTRY

330244 How long a current of 3 amperes has to be passed through a solution of \(\mathrm{AgNO}_{3}\) to coat a metal surface of \(80 \mathrm{~cm}^{2}\) and \(0.005 \mathrm{~mm}\) thick layer. Density of Ag is \(10.5 \mathrm{~g} \mathrm{~cm}^{-3}\).

1 125.1 seconds
2 12.5 seconds
3 155.2 seconds
4 200 seconds
CHXII03:ELECTROCHEMISTRY

330245 By passing electric current, \({\rm{NaCl}}{{\rm{O}}_{\rm{3}}}\) is converted into \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) according to the following equation:
\(NaCl{O_3} + {H_2}O \to NaCl{O_4} + {H_2}\)
How many moles of \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) will be formed when three faradays of charge is passed through \({\rm{NaC}}{{\rm{l}}_{\rm{3}}}\) ?

1 \({\rm{0}}{\rm{.75}}\)
2 \({\rm{3}}{\rm{.0}}\)
3 \({\rm{1}}{\rm{.5}}\)
4 \({\rm{1}}{\rm{.0}}\)
CHXII03:ELECTROCHEMISTRY

330246 In a Cu voltmeter, mass deposited in 30 s is "mg " If the time-current graph is shown in the following figure
What is the electrochemical equivalent of Cu?
supporting img

1 \({\rm{m/3}}\)
2 \({\rm{m/4}}\)
3 \(\frac{{\rm{m}}}{{{\rm{63}}{\rm{.5}}}}\)
4 \({\rm{m/2}}\)
CHXII03:ELECTROCHEMISTRY

330247 What is the number of moles of electrons passed when current of 5 ampere is passed through a solution of \(\mathrm{FeCl}_{3}\) for 20 minutes?

1 \(6.22 \times 10^{-2}\)
2 \(1.56 \times 10^{-2}\)
3 \(3.12 \times 10^{-2}\)
4 \(4.25 \times 10^{-2}\)
CHXII03:ELECTROCHEMISTRY

330244 How long a current of 3 amperes has to be passed through a solution of \(\mathrm{AgNO}_{3}\) to coat a metal surface of \(80 \mathrm{~cm}^{2}\) and \(0.005 \mathrm{~mm}\) thick layer. Density of Ag is \(10.5 \mathrm{~g} \mathrm{~cm}^{-3}\).

1 125.1 seconds
2 12.5 seconds
3 155.2 seconds
4 200 seconds
CHXII03:ELECTROCHEMISTRY

330245 By passing electric current, \({\rm{NaCl}}{{\rm{O}}_{\rm{3}}}\) is converted into \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) according to the following equation:
\(NaCl{O_3} + {H_2}O \to NaCl{O_4} + {H_2}\)
How many moles of \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) will be formed when three faradays of charge is passed through \({\rm{NaC}}{{\rm{l}}_{\rm{3}}}\) ?

1 \({\rm{0}}{\rm{.75}}\)
2 \({\rm{3}}{\rm{.0}}\)
3 \({\rm{1}}{\rm{.5}}\)
4 \({\rm{1}}{\rm{.0}}\)
CHXII03:ELECTROCHEMISTRY

330246 In a Cu voltmeter, mass deposited in 30 s is "mg " If the time-current graph is shown in the following figure
What is the electrochemical equivalent of Cu?
supporting img

1 \({\rm{m/3}}\)
2 \({\rm{m/4}}\)
3 \(\frac{{\rm{m}}}{{{\rm{63}}{\rm{.5}}}}\)
4 \({\rm{m/2}}\)
CHXII03:ELECTROCHEMISTRY

330247 What is the number of moles of electrons passed when current of 5 ampere is passed through a solution of \(\mathrm{FeCl}_{3}\) for 20 minutes?

1 \(6.22 \times 10^{-2}\)
2 \(1.56 \times 10^{-2}\)
3 \(3.12 \times 10^{-2}\)
4 \(4.25 \times 10^{-2}\)
CHXII03:ELECTROCHEMISTRY

330244 How long a current of 3 amperes has to be passed through a solution of \(\mathrm{AgNO}_{3}\) to coat a metal surface of \(80 \mathrm{~cm}^{2}\) and \(0.005 \mathrm{~mm}\) thick layer. Density of Ag is \(10.5 \mathrm{~g} \mathrm{~cm}^{-3}\).

1 125.1 seconds
2 12.5 seconds
3 155.2 seconds
4 200 seconds
CHXII03:ELECTROCHEMISTRY

330245 By passing electric current, \({\rm{NaCl}}{{\rm{O}}_{\rm{3}}}\) is converted into \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) according to the following equation:
\(NaCl{O_3} + {H_2}O \to NaCl{O_4} + {H_2}\)
How many moles of \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) will be formed when three faradays of charge is passed through \({\rm{NaC}}{{\rm{l}}_{\rm{3}}}\) ?

1 \({\rm{0}}{\rm{.75}}\)
2 \({\rm{3}}{\rm{.0}}\)
3 \({\rm{1}}{\rm{.5}}\)
4 \({\rm{1}}{\rm{.0}}\)
CHXII03:ELECTROCHEMISTRY

330246 In a Cu voltmeter, mass deposited in 30 s is "mg " If the time-current graph is shown in the following figure
What is the electrochemical equivalent of Cu?
supporting img

1 \({\rm{m/3}}\)
2 \({\rm{m/4}}\)
3 \(\frac{{\rm{m}}}{{{\rm{63}}{\rm{.5}}}}\)
4 \({\rm{m/2}}\)
CHXII03:ELECTROCHEMISTRY

330247 What is the number of moles of electrons passed when current of 5 ampere is passed through a solution of \(\mathrm{FeCl}_{3}\) for 20 minutes?

1 \(6.22 \times 10^{-2}\)
2 \(1.56 \times 10^{-2}\)
3 \(3.12 \times 10^{-2}\)
4 \(4.25 \times 10^{-2}\)
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CHXII03:ELECTROCHEMISTRY

330244 How long a current of 3 amperes has to be passed through a solution of \(\mathrm{AgNO}_{3}\) to coat a metal surface of \(80 \mathrm{~cm}^{2}\) and \(0.005 \mathrm{~mm}\) thick layer. Density of Ag is \(10.5 \mathrm{~g} \mathrm{~cm}^{-3}\).

1 125.1 seconds
2 12.5 seconds
3 155.2 seconds
4 200 seconds
CHXII03:ELECTROCHEMISTRY

330245 By passing electric current, \({\rm{NaCl}}{{\rm{O}}_{\rm{3}}}\) is converted into \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) according to the following equation:
\(NaCl{O_3} + {H_2}O \to NaCl{O_4} + {H_2}\)
How many moles of \({\rm{NaCl}}{{\rm{O}}_{\rm{4}}}\) will be formed when three faradays of charge is passed through \({\rm{NaC}}{{\rm{l}}_{\rm{3}}}\) ?

1 \({\rm{0}}{\rm{.75}}\)
2 \({\rm{3}}{\rm{.0}}\)
3 \({\rm{1}}{\rm{.5}}\)
4 \({\rm{1}}{\rm{.0}}\)
CHXII03:ELECTROCHEMISTRY

330246 In a Cu voltmeter, mass deposited in 30 s is "mg " If the time-current graph is shown in the following figure
What is the electrochemical equivalent of Cu?
supporting img

1 \({\rm{m/3}}\)
2 \({\rm{m/4}}\)
3 \(\frac{{\rm{m}}}{{{\rm{63}}{\rm{.5}}}}\)
4 \({\rm{m/2}}\)
CHXII03:ELECTROCHEMISTRY

330247 What is the number of moles of electrons passed when current of 5 ampere is passed through a solution of \(\mathrm{FeCl}_{3}\) for 20 minutes?

1 \(6.22 \times 10^{-2}\)
2 \(1.56 \times 10^{-2}\)
3 \(3.12 \times 10^{-2}\)
4 \(4.25 \times 10^{-2}\)