(a) What would be the colour of the solution when copper oxide and dilute hydrochloric acid are mixed
(b) Write the chemical equation which represents that the effect of base in neutralised by the acid are vice versa.

Explanation

(a) The colour of the solution would be blusing green due to the formation of cupric chloride or copper (II) chloride.
`CuO(s)+2HCl(aq)tounderset("Bluish green")(CuCl_(2))(aq)+H_(2)O(aq).`
(b) `HCl(aq)+NaOH(aq)toNaCl(aq)+H_(2)O(aq)`