Question 28
Question 28 of 40
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Periodic Table
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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
9.3. Alloys and their properties

Explain in terms of structure how alloys can be harder and stronger than the pure metals because the different sized atoms or ions in alloys mean the layers can no longer slide over each other

8. The Periodic Table
8.4. Transition elements

Describe the transition elements as metals that: (a) have high densities (b) have high melting points (c) have variable oxidation numbers (d) form coloured compounds (e) often act as catalysts as elements and in compounds

10. Chemistry of the envi...
10.1. Water

Describe how to test for the purity of water using melting point and boiling point