Electrochemistry Quiz

The aqueous solution of which of the following compounds is the best conductor of electric current?

• Acetic acid

• Hydrochloric acid

• Ammonia

• Fructose

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

The equivalent conductance of Ba2+ and Cl- are respectively 127 and 76 ohm-1 cm-1 eq-1 at infinite dilution. The equivalent conductance of BaCl2 at infinite dilution will be

• 139.5

• 203

• 279

• 101.5

When heating one end of a metal plate, the other end gets hot because of

• the resistance of the metal

• mobility of atoms in the metal

• energised electrons moving to the other end

• minor perturbation in the energy of atoms.

The weight of silver displaced by a quantity of electricity which displaces 5600ml of O2 at STP will be

• 5.4g

• 10.8g

• 54.9g

• 108.0g

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)

• 0.01N

• 0.01M

• 0.02M

• 0.2N

On electrolysis of dilute sulphuric acid using platinum electrodes, the product obtained at the anode will be

• hydrogen

• oxygen

• hydrogen sulphide

• sulphur dioxide

A device that converts the energy of combustion of fields like hydrogen and methane directly into electrical energy is known as

• Electrolytic cell

• Dynamo

• Ni-Cd cell

• Fuel cell

Which reaction is not feasible?

• 2KO + Br2 → 2KBr + I2

• 2KBr + I2 → 2KI + Br2

• 2KBr + Cl2 → 2KCl + Br2

• 2H2O + 2F2 → 4HF + O2

Without losing its concentration ZnCl2 solution cannot be kept in contact with

• Au

• Al

• Pb

• Ag