Question 7
Question 7 of 40
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Periodic Table
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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
2. Atoms, elements and co...
2.6. Giant covalent structures

Describe the giant covalent structures of graphite, diamond and silicon(IV) oxide, \( SiO_2 \)

4. Electrochemistry
4.1. Electrolysis

Identify the products formed at the electrodes and describe the observations made during the electrolysis of: (a) molten lead(II) bromide (b) concentrated aqueous sodium chloride (c) dilute sulfuric acid using inert electrodes made of platinum or carbon/graphite

9. Metals
9.5. Corrosion of metals

State the conditions required for the rusting of iron and steel to form hydrated iron(III) oxide