Question

copper sulphate combined with sodium carbonate​

Answer 1

Answer: no reaction

Explanation: All you will get is a heterogeneous mixture of the two solids.

Answer 2

Answer:

$\huge \underline \pink{ANSWER}$

Copper sulphate crystals when added to water form aqueous solution which is blue in colour. So when the sodium carbonate chemical is added to this aqueous solution of copper sulphate, the colour of the aqueous solution changes to the pale green which is in the form of precipitate.