Class 12 Electrochemistry Online Mock Test : 1

1. The aqueous solution of which of the following compounds is the best conductor of electric current?
a. Acetic acid,
b. Hydrochloric acid
c. Ammonia
d. Fructose

2. An increase in the conductivity equivalent of a solid electrolyte with dilution is primarily due to
increased ionic mobility of ions
100 percent electrolyte ionisation with natural dilution
increase in both ion numbers and ionic mobility
A rise in ion counts

4. When heating one end of a metal plate, the other end gets hot because of
a. the resistance of the metal
b. mobility of atoms in the metal
c. energised electrons moving to the other end
d. minor perturbation in the energy of atoms.

6. Once a current of 1.0 ampere was passed through one litre of CuCl2 solution for 16 min and 5 sec, all of the solution’s copper was deposited at the cathode. The strength of solution CuCl2 was (Molar mass of Cu = 63.5; Faraday constant = 96,500 C/mol)
a.0.01N
b.0.01M
c.0.02M
d.0.2N

7. On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be
hydrogen
oxygen
hydrogen sulphide
sulphur dioxide

8. A device that converts the energy of combustion of fields like hydrogen and methane directly into electrical energy is known as
a. Electrolytic cell
b. Dynamo
c. Ni-Cd cell
d. Fuel cell

10. Without losing its concentration ZnCl2 solution cannot be kept in contact with
a.Au
b.Al
c.Pb
d.Ag