Suggest chemical tests to identify 3 solid samples of sodium chloride, sodium carbonate and calcium chloride respectively.

Add acid, Na2CO3 fizzes.

Add CO2 or CO3^2-, CaCl2 will form a ppt of CaCO3
Add AgNO3 which will ppt AgCl from NaCl; however, this will not different between NaCl and CaCO3. A flame test will differentiate but I don't call that a chemical test.