Silver nitrate solution can be used to distinguish between ethanoyl chloride and 2-chlorobutane.

Give the observations you would expect when a few drops of silver nitrate solution are added to separate samples of ethanoyl chloride and 2-chlorobutane at room temperature.

• Observation with ethanoyl chloride:
• Observation with 2-chlorobutane:

Three unlabelled bottles are known to contain either propan-1-ol, propanal, or propanone.

A sample of each liquid is warmed with Fehling's solution.

• Identify the liquid that reacts with Fehling's solution and give the expected observation.
• Suggest a further simple test-tube reaction that can be used to distinguish between the remaining two liquids.
• Give the expected observation with the liquid that reacts to this further test.