Class XII

How much charge is required for the reduction of 1 mol of Al3+Al3+ to Al?
  1. 6F
  2. 5F
  3. 4F
  4. 3F
Kohlrausch law of independent migration of ions states
  1. that limiting molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte
  2. none of these
  3. that molar conductivity of an electrolyte can be represented as the sum of the individual contributions of the anion and cation of the electrolyte
  4. that limiting molar conductivity of an electrolyte can be represented as the difference of the individual contributions of the anion and cation of the electrolyte
A secondary cell after use ________ recharged by passing current through it in the ________ so that it can/can’t be used again.
  1. can be, same direction
  2. cannot be, opposite direction
  3. can be, opposite direction
  4. none of these
Which of the following electrolytic solutions has the least specific conductance?
  1. 0.1 M difluoroacetic acid
  2. 0.1 M chloroacetic acid
  3. 0.1 M acetic acid
  4. 0.1 M fluoroacetic acid
How much electricity in terms of Faraday is required to produce 20.0 g of Ca from molten CaCl2?
  1. 0.8F
  2. 1.3F
  3. 1F
  4. 1.2F
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LKG - 12th

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