.(a)(i) Name two gases that can be used to perform the fountain experiment. (ii) What is the aim of he fountain experiment? (iii) Describe briefly the fount...

Answer Details

a)

(i) The two gases that can be used to perform the fountain experiment are hydrogen and helium.

(ii) The aim of the fountain experiment is to demonstrate the properties of a gas and the behavior of a gas in a closed container.

(iii) The fountain experiment involves filling a container with a gas, such as hydrogen or helium, and then releasing the gas into the air. The gas rises into the air and creates a fountain-like effect, which demonstrates the properties of a gas.

b)

(i) Two chemical industries are the petroleum industry and the pharmaceutical industry.

(ii) The effects of a chemical industry on the community in which it is sited can include air pollution, water pollution, and negative impacts on the health of local residents.

c)

(i) Three products of the destructive distillation of coal are coal gas, coal tar, and coke.

(ii) Coal gas can be used as a fuel, while coke can be used as a fuel and in the production of iron and steel.

d)

(i) Two substances responsible for hardness in water are calcium and magnesium.

(ii) Two methods for the removal of hardness in water are ion exchange and reverse osmosis.

(iii) Two advantages of hard water are that it can improve the flavor of coffee and tea, and it can provide beneficial minerals for the body.