Question 29
Question 29 of 40
Question image for Q29
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
9.5. Corrosion of metals

Describe how barrier methods prevent rusting by excluding oxygen or water

4. Electrochemistry
4.1. Electrolysis

State that metal objects are electroplated to improve their appearance and resistance to corrosion