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Electrochemistry

MHT-CET Chemistry. Try each one first, then open its answer.

Top 10 MHT-CET PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 19 times: 5 in 2023, 5 in 2024, 9 in 2026. This one: 19 May 2026 S2 See all 19 of this type

    25
    What is the molar conductivity of a 0.5 mol/dm30.5\ \mathrm{mol/dm^3} AgNO3\mathrm{AgNO_3} solution if electrolytic conductivity of it is 5.76×10−3 S cm−15.76 \times 10^{-3}\ \mathrm{S\ cm^{-1}} at 298298 K?

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  2. Question 2

    This type asked 15 times: 2 May 2023 S1, 2 May 2023 S2, 3 May 2023 S2, 4 May 2023 S2, 9 May 2023 S2, 10 May 2023 S1, 11 May 2023 S1, 11 May 2023 S2, 16 May 2023 S1, 16 May 2023 S2, 12 May 2024 S2, 14 May 2024 S2, 17 Apr 2026 S1, 19 Apr 2026 S1, 15 May 2026 S2. This one: 15 May 2026 S2 See all 15 of this type

    24
    A conductivity cell containing 0.010.01 M KCl produces resistance 600600 ohms at 25∘C25^\circ C. Find the cell constant if conductivity of 0.010.01 M KCl at the same temperature is 0.0014 ohm−1 cm−10.0014\ \mathrm{ohm^{-1}\ cm^{-1}}.

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  3. Question 3

    This type asked 15 times: 10 May 2023 S2, 15 May 2023 S1, 16 May 2023 S1, 9 May 2024 S2, 10 May 2024 S2, 11 May 2024 S2, 13 May 2024 S2, 14 May 2024 S2, 22 Apr 2025 S1, 22 Apr 2025 S2, 15 Apr 2026 S2, 17 Apr 2026 S1, 12 May 2026 S1, 13 May 2026 S1, 14 May 2026 S1. This one: 14 May 2026 S1 See all 15 of this type

    23
    Calculate the standard potential of the cell that has the following reaction. Zn(s)+2H(1M)+→H2(g,1atm)+Zn(1M)2+\mathrm{Zn_{(s)} + 2H^+_{(1M)} \rightarrow H_{2(g,1atm)} + Zn^{2+}_{(1M)}} if E0(Zn2+/Zn)=−0.763E^0(\mathrm{Zn^{2+}/Zn}) = -0.763 V.

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  4. Question 4

    This type 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. This one: 15 May 2026 S1 See all 14 of this type

    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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  5. Question 5

    This type asked 11 times: 21 Apr 2025 S1, 21 Apr 2025 S2, 22 Apr 2025 S1, 22 Apr 2025 S2, 25 Apr 2025 S1, 26 Apr 2025 S1, 26 Apr 2025 S2, 11 Apr 2026 S2, 20 Apr 2026 S2, 13 May 2026 S2, 15 May 2026 S1. This one: 15 May 2026 S1 See all 11 of this type

    24
    Identify the EredE_{red} value from following, if CuSO4\mathrm{CuSO_4} solution dipped with Cu rod is diluted to 1010 times.

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  6. Question 6

    This type asked 10 times: 2 May 2023 S1, 4 May 2023 S2, 12 May 2024 S2, 14 May 2024 S1, 19 Apr 2025 S1, 19 Apr 2025 S2, 20 Apr 2025 S2, 23 Apr 2025 S1, 26 Apr 2025 S2, 19 May 2026 S2. This one: 19 May 2026 S2 See all 10 of this type

    26
    For the cell Ni(s)∣Ni(1M)++∣∣Cu(1M)++∣Cu(s)\mathrm{Ni_{(s)} | Ni^{++}_{(1M)} || Cu^{++}_{(1M)} | Cu_{(s)}}, if the concentration of an ion in the anode compartment is doubled, then the emf of cell will be

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  7. Question 7

    Asked 9 times: 21 Apr 2025 S1*, 21 Apr 2025 S2*, 22 Apr 2025 S1*, 22 Apr 2025 S2*, 25 Apr 2025 S1*, 26 Apr 2025 S1*, 11 Apr 2026 S2*, 20 Apr 2026 S2*, 13 May 2026 S2 (* = numbers or wording changed that year) See all 9 times it was asked

    28
    Calculate the electrode potential of Mg2+/Mg\mathrm{Mg^{2+}/Mg} electrode having 0.010.01 M concentration of Mg2+\mathrm{Mg^{2+}} (E∘Mg2+/Mg=−2.36(E^\circ\mathrm{Mg^{2+}/Mg} = -2.36 V).

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  8. Question 8

    This type asked 9 times: May 2022 S1, 3 May 2023 S2, 12 May 2024 S2, 13 May 2024 S2, 14 May 2024 S1, 25 Apr 2025 S2, 19 Apr 2026 S2, 14 May 2026 S1, 15 May 2026 S1. This one: 15 May 2026 S1 See all 9 of this type

    25
    Which of the following is the correct expression for molar conductivity of Na2SO4\mathrm{Na_2SO_4} at infinite dilution?

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  9. Question 9

    Asked 8 times: 2 May 2023 S1*, 4 May 2023 S2*, 10 May 2023 S1*, 11 May 2023 S2*, 16 May 2023 S1*, 12 May 2024 S2*, 14 May 2024 S2*, 19 Apr 2026 S1 (* = numbers or wording changed that year) See all 8 times it was asked

    25
    What is the conductivity of 0.02 M AgNO30.02\ \mathrm{M\,AgNO_3} solution having cell constant 1.2 cm−11.2\ \mathrm{cm^{-1}} and resistance 95.095.0 ohms ?

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  10. Question 10

    This type asked 7 times: 9 May 2023 S1, 10 May 2023 S2, 15 May 2023 S2, 11 May 2024 S2, 15 Apr 2026 S1, 20 Apr 2026 S2, 19 May 2026 S1. This one: 19 May 2026 S1 See all 7 of this type

    29
    The molar conductivity of 0.010.01M acetic acid at 25∘C25^\circ\mathrm{C} is 16 S m2 mol−116\ \mathrm{S\ m^2\ mol^{-1}}. Find its percent dissociation in the 0.010.01M solution if molar conductivity of acetic acid at zero concentration is 390 S m2 mol−1390\ \mathrm{S\ m^2\ mol^{-1}}.

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