Class XII

Electrolytic cell is a device for using electrical energy to carry
  1. non-spontaneous chemical reactions
  2. spontaneous chemical reactions
  3. non-spontaneous chemical reactions
  4. non-spontaneous chemical reactions
According to Faraday’s Second Law of Electrolysis the amounts of different substances liberated by the same quantity of electricity passing through the electrolytic solution are proportional
  1. their chemical equivalent weights
  2. to their atomic weight
  3. to their Atomic number
  4. to their nuclear masses
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
Conductivity always decreases with decrease in concentration both, for weak and strong electrolytes because of the fact that
  1. mobility of ions that carry the current in a solution increases on dilution
  2. the number of ions per unit volume that carry the current in a solution decreases on dilution
  3. the number of collisions of ions per unit volume that carry the current in a solution increases on dilution
  4. the number of ions per unit volume that carry the current in a solution increases on dilution
Fuel cells are ________ that are designed to convert the energy of combustion of fuels like hydrogen, methane, methanol, etc. directly into_________.
  1. Electrolytic cells , electrical energy
  2. Galvanic cells , electrical energy
  3. Galvanic cells , thermal energy
  4. Galvanic cells , hydraulic energy
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