Q23 of 0620_s12_qp_12

Question 23

Question 23 of 40

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No letter options?

Older MCQs might not have the typical A, B, C, D choices. They have choices 1, 2, 3, and a combination of them is the answer. Below is the key that maps such combinations to the answer.

A 1, 2 and 3 are correct

B 1 and 2 only are correct

C 2 and 3 only are correct

D 1 only is correct

Topics Tested

9. Metals

9.2. Uses of metals

Describe the uses of metals in terms of their physical properties, including: (a) aluminium in the manufacture of aircraft because of its low density (b) aluminium in the manufacture of overhead electrical cables because of its low density and good electrical conductivity (c) aluminium in food containers because of its resistance to corrosion (d) copper in electrical wiring because of its good electrical conductivity and ductility

9. Metals

9.3. Alloys and their properties

State that alloys can be harder and stronger than the pure metals and are more useful

9. Metals

9.6. Extraction of metals

State that the main ore of aluminium is bauxite and that aluminium is extracted by electrolysis