Question 20 of 114

Excess of dilute sodium hydroxide solution is gradually added with shaking to an aqueous solution of zinc sulphate. What would you observe?

(a) A light blue precipitate is first formed which finally dissolves to give a deep blue solution

(b) A white precipitate appears which dissolves to give a colourless solution.

(c) A white precipitation is formed which does not dissolve 

(d) No change takes place and the solution remains clear