Page 36 - Ranger PT3 2022 science

Science PT3 Chapter 4 Reactivity of Metals
2. Reaction takes place in the blast furnace at high temperature.

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Production of iron

Carbon + Oxygen → Carbon dioxide

Carbon dioxide + Carbon → Carbon monoxide

Production of slag

Calcium carbonate → Calcium oxide + Carbon dioxide

Calcium oxide + Silicon dioxide → Calcium silicate

Mining Issues in Malaysia
1. The following are among the problems or issues that arise relating to mining
activities in Malaysia:
(i) Air pollution is caused by fuels burning and gas produced by blast furnaces.
(ii) Water pollution as a result of cleaning of ores.
(iii) Sound pollution by the mining machinery.
(iv) Consumption of large amount of electrical energy.
(v) Soil erosion due to mining.
(vi) Destruction of habitats due to construction of mines.

2. Solving the issue of mineral deposits in Malaysia:
(i) Limiting open mining and reducing the number of mining areas to prevent
destruction of habitats.
(ii) Mining areas should be located in separated zones far from the local community
settlements. Form 3

Form 3

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