Dr. J M D'Souza and Dr. Kirti J D'Souza Solutions for Chapter: Chemical Effects of Electric Current, Exercise 5: HIGHER ORDER THINKING SKILLS

Draw atoms or molecules in containers A and B to show weak and non-electrolyte solutions.

In an electroplating chamber, the anode is a copper rod. What will happen to the anode if the chamber is used to coat copper on iron objects using copper sulphate $\left({\mathrm{CuSO}}_4\right)$ solution? Will the electrode be damaged? Why?

A mixture of table salt $\left(\mathrm{NaCl}\right)$ and glucose powder is dissolved in distilled water. Will the solution conduct electricity? Why?

Give reason:

All compounds that dissolve in water are not electrolytes.

Give reason:

A bulb glows dimly when current is passed through a solution of vinegar.

Give reason:

Distilled water is not a conductor of electricity.

Give reason:

Bubbles form at the anode when current is passed through $\mathrm{NaCl}$.

Give reason:

At times while electroplating a plate, a part of it is covered with wax.