Electrolysis and Electrolytes

Q.

Strong electrolytes are those which

[MNR 1983]

1. Conduct electricity

2. Dissociate into ions at high dilution

3. Completely dissociate into ions at all dilutions

4. Dissolve readily in water

Q.

Which of the following aqueous solution will conduct an electric current quite well

[MP PMT 1987]

1. HCl

2. Pure water

3. Glycerol

4. Sugar

Q.

An electrolyte

[KCET 1984; MP PET/PMT 1988]

1. Forms complex ions in solution

2. Gives ions only when dissolved in water

3. Gives ions only when electricity is passed

4. Possesses ions even in solid state

Q.

On the electrolysis of aqueous solution of sodium sulphate, on cathode we get

1. Na

2. H₂

3. SO₃

4. SO₂

Q.

If the current is passed into the solution of an electrolyte

[AIIMS 1979]

1. Anions move towards anode, cations towards cathode

2. Anions and cations both move towards anode

3. No movement of ions takes place

4. Anions move towards cathode, cations towards anode

Q.

Which of the following will not conduct electricity in aqueous solution

[AMU 1982, 83]

1. Common salt

2. None of these

3. Sugar

4. Copper sulphate

Q. How much charge is required to produce hydrogen gas at the rate of 1 $\text{mL/s}$ by the electrolysis of molten $NaCl$?

1. 1.4 C
2. 18.4 C
3. 4.3 C
4. 8.6 C

Q.

Which of the following compounds will not undergo decomposition on passing electricity through aqueous solution

[MP PET 2001]

1. Sugar

2. Sodium Chloride

3. Sodium Bromide

4. Sodium Acetate

Q.

Electrolytes when dissolved in water dissociates into ions because

[CPMT 1974, 78; MNR1983]

1. The force of repulsion increases

2. They are unstable

3. The water dissolves it

4. The forces of electrostatic attraction are broken down by water

Q.

Electric current is passed through an aqueous solution of the following. Which one shall decompose

[NCERT 1972]

1. Ethyl alcohol

2. Glucose

3. Urea

4. AgNO₃