ICSE.X. CHEMISTRY. 6. ELECTROLYSIS

In electrolytes, the conduction of electricity is due to the movement of:

• ions

• electrons

• atoms

• molecules

The process of separation of ions of the ionic solid in the aqueous solution is known as:

• ionisation

• dissociation

• conduction

• electrolysis

The substances which conduct electric current in the solid state and at the same time are not chemically decomposed, are known as:

• insulators

• good conductors

• metallic conductors

• electrolytes

Metallic conduction is an example of:

• physical change

• chemical change

• physicochemical change

• none of these

Which of the following is not a conductor?

• rubber

• copper

• sodium chloride

• hydrochloric acid

Which of the following is not an electrolyte?

• sodium hydroxide

• sodium chloride

• acetic acid

• copper wires

The substances which do not conduct electric current in the molten dissolved state are called:

• electrolytes

• non-electrolytes

• metallic conductors

• insulators

Which of the following acid is a weak electrolyte?

• sulphuric acid

• nitric acid

• phosphoric acid

• hydrochloric acid

Weak electrolytes are: (a) slightly dissociated in molten state (b) completely dissociated in molten state (c) not dissociated in molten state (d) completely dissociated in aqueous solution.

• slightly dissociated in molten state

• completely dissociated in molten state

• not dissociated in molten state

• completely dissociated in aqueous solution

Which of the following base is a weak electrolyte?

• sodium hydroxide

• potassium hydroxide

• barium hydroxide

• ammonium hydroxide