How can you tell a ca(no3)2 solution from a zn(no3)2 solution?

Explanation:

1) solution

To the solution of calcium nitrate add few drops of sodium hydroxide. Formation of white solid calcium hydroxide will be observed.

2) solution

To the solution of add few drops of liquid ammonia which will precipitate out white gelatinous zinc hydroxide from the solution. And this zinc hydroxide gets dissolves when excess of liquid ammonia is added to the solution.

a polar bond is formed when electrons are shared unevenly between atoms