Question

9.Wich of the following is an acid
O Na oH
О кон
O HNO3
O Mg(OH)2

10.The colour of the copper sulphate solution is
O Red
O Blue
O Green
O orange​

Answer 1

Explanation:

10. When copper is heated the colour changes from blue to white as water evaporates. When five water molecules are present and it's in blue colour it is called as hydrated copper sulphate and then after heating when water molecules get evaporated it is called as anhydrous copper sulphate.