1What happens when red litmus paper and blue litmus paper are dipped into ash water? Write down your observation.
2What happens when sodium hydroxide is put into dilute ammonium sulphate? Write your conclusion.
3What is the difference between a base and an alkali? Answer with examples.
4How are strong and weak alkalis told apart? Give an example of each.
5Write any five physical properties of a base.
6What is a neutralisation reaction? Show it with one equation.
7Write, with an equation, the ionisation that takes place when sodium hydroxide dissolves in water.
8Write the uses of calcium hydroxide.
9What is gained by spreading lime on a field with acidic soil? Give the reason.