CONCLUSION

The change of colour of anhydrous Copper (II) Sulphate and dry cobalt (II) chloride paper indicate that the colourless liquid is water.

Water turns white anhydrous Copper (II) Sulphate blue.

The colourless gas produced forms a white precipitate with calcium hydroxide.

The gas is Carbon (IV) Oxide.

From the above observations we can conclude that candle wax is made up of hydrogen and carbon only.