Question 9
Question 9 of 40
Question image for Q9
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
7. Acids, bases and salts
7.2. Oxides

Classify Al(_2)O(_3) and ZnO as amphoteric oxides

3. Stoichiometry
3.1. Formulae

Deduce the formula of an ionic compound from the relative numbers of the ions present in a model or a diagrammatic representation or from the charges on the ions

9. Metals
9.4. Reactivity series

Explain the apparent unreactivity of aluminium in terms of its oxide layer