JAMB Chemistry 2017 Objective — Question 9

Question 9 of 40 from the Joint Admissions and Matriculation Board (JAMB) Chemistry 2017 Objective paper, with the correct answer and a full explanation.

The constituents of air necessary in the rusting process are

A. A. O2 and H2OCorrect
B. B. Ar and CO2
C. C. CO2 and H2O
D. D. O2 and CO2

Explanation

Oxygen and moisture (water) are both required for iron to rust: 4Fe + 3O2 + 2xH2O → 2Fe2O3.xH2O.

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