What is the chemical test for chlorine gas?

Ethanol ($C_2{H}_{5}OH$) is burned in air. The diagram below shows the experimental setup used to collect and test the products of combustion.

Draw on this

A colourless liquid collects in the U-shaped tube and the limewater turns cloudy rapidly.

Describe a chemical test to show that the colourless liquid contains water.

• Test:
• Result:

Describe a physical test to show that the colourless liquid is pure water.

• Test:
• Result:

The reaction in the conical flask causes the limewater to turn cloudy quickly. Which two of the following statements are correct?

• Ethanol combustion produces carbon dioxide gas.
• The cloudiness is caused by the formation of soluble calcium hydrogen carbonate.
• The cloudiness is caused by the formation of an insoluble white precipitate of calcium carbonate.
• Carbon dioxide from the air is the main reason why the limewater turns cloudy.
• The reaction in the limewater is an example of a thermal decomposition.