4.3 Extraction of Metals

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Science Form 3

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Neniser

Malasia

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4.3 Extraction of Metals


4.3 Extraction of MetalsVersión en línea Science Form 3 por Neniser 1 What is meant by extraction of metals? a The process of obtaining metals from their ores. 2 What is an ore? a A naturally occurring rock containing metal compounds. 3 Which method is used to extract metals that are higher than carbon in the reactivity series? a C. Heating b D. Distillation c A. Reduction with carbon d B. Electrolysis 4 Which method is used to extract metals lower than carbon in the reactivity series? a A. Electrolysis b C. Reduction with carbon c D. Condensation d B. Filtration 5 How are some metals extracted directly from their metallic compounds? a By direct heating. 6 Metals such as gold exist naturally in what form in the Earth's crust? a In the form of elements. 7 Where does the extraction of iron from its ore take place? a D. Cooling chamber b A. Electrolysis tank c B. Blast furnace d C. Water bath 8 Name the three materials added into the blast furnace. a Iron ore, coke, and limestone. 9 What is pumped into the bottom of the blast furnace? a A very hot blast of air. 10 What is the function of coke in the extraction process? a To reduce iron oxide and help produce iron. 11 What happens to the iron produced in the furnace? a It melts and flows to the bottom of the furnace. 12 What is cast iron? a Solidified molten iron. 13 What is slag? a Waste material formed during the extraction process. 14 Why does slag float on molten iron? a Because slag is less dense than molten iron. 15 State two uses of slag. a Making building bases Making roads 16 Which of the following is a mining issue in Malaysia? a D. Better water quality b B. Soil erosion c C. Increased rainfall d A. Increased biodiversity 17 State one cause of air pollution related to mining. a Burning of fuels or gases released from blast furnaces. 18 What type of pollution is caused by mining machinery? a Sound pollution. 19 How does mining affect habitats? Written answer 20 State one way to reduce environmental problems caused by mining activities. Written answer

4.3 Extraction of Metals

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4.3 Extraction of MetalsVersión en línea

por Neniser

What is meant by extraction of metals?

What is an ore?

Which method is used to extract metals that are higher than carbon in the reactivity series?

Which method is used to extract metals lower than carbon in the reactivity series?

How are some metals extracted directly from their metallic compounds?

Metals such as gold exist naturally in what form in the Earth's crust?

Where does the extraction of iron from its ore take place?

Name the three materials added into the blast furnace.

What is pumped into the bottom of the blast furnace?

What is the function of coke in the extraction process?

What happens to the iron produced in the furnace?

What is cast iron?

What is slag?

Why does slag float on molten iron?

State two uses of slag.

Which of the following is a mining issue in Malaysia?

State one cause of air pollution related to mining.

What type of pollution is caused by mining machinery?

How does mining affect habitats?

State one way to reduce environmental problems caused by mining activities.