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Faraday's first law: mass deposited, time, current or charge for an electrode product

This type of question, asked 14 times: May 2021 S1, May 2022 S1, 9 May 2023 S1, 9 May 2023 S2, 15 May 2023 S1, 16 May 2023 S2, 9 May 2024 S1, 10 May 2024 S1, 11 May 2024 S1, 19 Apr 2025 S1, 20 Apr 2026 S1, 12 May 2026 S2, 13 May 2026 S2, 15 May 2026 S1. All 14 questions below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    May 2021 S1

    52
    0.05 F electricity is passed through CuSO4_4 solution. Calculate the mass of Cu produced at cathode. (Molar mass of Cu = 63.5 g mol−1^{-1})

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  2. Question 2

    May 2022 S1

    67
    How long will it take to produce 5.4 g of Ag from molten AgCl by passing 5 amp current? (Molar mass Ag = 108 g mol−1^{-1})

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  3. Question 3

    9 May 2023 S1

    98
    What volume of chlorine gas (molar mass 71) is evolved at STP during electrolysis of fused NaCl by passage of 1-amp current for 965 second? (At STP, V =22.4 dm3= 22.4\,\text{dm}^3)

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  4. Question 4

    9 May 2023 S2

    97
    What is the quantity of electricity required to produce 4.8 g of Mg (molar mass = 24 g mol−1^{-1}) from its salt solution?

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  5. Question 5

    15 May 2023 S1

    78
    Calculate the mass of 'Ca' deposited at cathode by passing 0.8 ampere current through molten CaCl2_2 in 60 minutes. [Molar mass of Ca = 40 g mol−1^{-1}]

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  6. Question 6

    16 May 2023 S2

    67
    What is the number of faraday required to produce 0.18 g aluminium at cathode during electrolysis of molten AlCl₃? (Molar mass of Al = 27 g mol−1^{-1})

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  7. Question 7

    9 May 2024 S1

    60
    Calculate current in ampere required to deposit 4.8 g Cu from its salt solution in 30 minutes. [Molar mass of Cu =63 g/mol=63\,g/mol]

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  8. Question 8

    10 May 2024 S1

    88
    Mass of Mg from electrolysis of molten MgCl2_2: 2 A for 482.5 s. (MMg_{\text{Mg}}=24 g/mol)

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  9. Question 9

    11 May 2024 S1

    71
    Find the number of faradays of electricity required to produce 45 g of Al from molten Al2O3Al_2O_3. (At. Mass of Al = 27)

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  10. Question 10

    19 Apr 2025 S1

    93
    How long should aqueous NaCl be electrolyzed by passing 100 ampere current, so that 0.5 mol chlorine is released at anode?

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  11. Question 11

    20 Apr 2026 S1

    27
    What is the quantity of electricity required to produce 88 g of Mg (molar mass = 24 g mol−124\ \mathrm{g\,mol^{-1}}) from MgCl2\mathrm{MgCl_2} solution ?

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  12. Question 12

    12 May 2026 S2

    25
    When 44 A current was passed through a salt solution for 4545 minutes, 2.9772.977 g metal was deposited. Calculate the charge on metal ion having molar mass 106.4106.4 g mol−1^{-1}.

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  13. Question 13

    13 May 2026 S2

    27
    When 66 g Cu metal is deposited at the cathode during the passage of 33 ampere current through its salt solution for xx minutes. Calculate the value of xx if the molar mass of copper is 63.5 g mol−163.5\ \mathrm{g\,mol^{-1}}

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  14. Question 14

    15 May 2026 S1

    23
    Calculate the mass of cobalt deposited when 1010 ampere current is passed for 109109 minutes through cobalt chloride solution. (Molar mass of Co=59\mathrm{Co} = 59 g/mol)

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