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12th Standard English Medium Chemistry Subject Electro Chemistry Book Back 1 Mark Questions with Solution Part - I

12th Standard

    Reg.No. :
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Chemistry

Time : 00:30:00 Hrs
Total Marks : 5
    5 x 1 = 5
  1. Electrolyte KCl KNO3 HCl NaOAC NaCl
    Λ-
    (Scm2 mol-1)
    149.9 145.0 426.2 91.0 126.5

    Calculate ΛoHoAC using appropriate molar conductances of the electrolytes listed above at infinite dilution in water at 25oC_______.

    (a)

    517.2

    (b)

    552.7

    (c)

    390.7

    (d)

    217.5

  2. Faraday constant is defined as_______.

    (a)

    charge carried by 1 electron

    (b)

    charge carried by one mole of electrons

    (c)

    charge required to deposit one mole of substance

    (d)

    charge carried by 6.22 ×1010 electrons

  3. How many faradays of electricity are required for the following reaction to occur MnO4-→ Mn2+

    (a)

    5F

    (b)

    3F

    (c)

    1F

    (d)

    7F

  4. A current strength of 3.86 A was passed through molten Calcium oxide for 41 minutes and 40 seconds. The mass of Calcium in grams deposited at the cathode is_______. (atomic mass of Ca is 40g / mol and 1F = 96500C).

    (a)

    4

    (b)

    2

    (c)

    8

    (d)

    6

  5. During electrolysis of molten sodium chloride, the time required to produce 0.1mole of chlorine gas using a current of 3A is _____.

    (a)

    55 minutes

    (b)

    107.2 minutes

    (c)

    220 minutes

    (d)

    330 minutes

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