4. Match each substance A to E listed below with the appropriate description in parts (i) to (v):
(D) Copper (II) sulphate
(i) A non-metal which is a good conductor of electricity
(ii)A covalent compound which behaves like an ionic compound in aqueous solution
(iii) A compound which is insoluble in cold water but soluble in excess of ammonia solution.
(iv) A pink metal which is deposited at the cathode during the electrolysis of the solution of this Salt.
(v) A non-metal which reacts with concentrated nitric acid to form its own acid as one of the product.
Step 1:Explanation for correct option:
The correct option is (iv) A pink metal which is deposited at the cathode during the electrolysis of the solution of this salt. During the electrolysis of Copper sulphate solution, copper ions get reduced to copper metal at the cathode. This results in the deposition of a pink-coloured metal copper at the cathode. The following chemical transformation is seen:
Step 2: Explanation for incorrect answers:
Final answer: The correct option is (iv) A pink metal which is deposited at the cathode during the electrolysis of the solution of this salt.