Question 8
Question 8 of 40
Question image for Q8
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
6. Chemical reactions
6.3. Reversible reactions and equil...

State the symbol equation for the production of ammonia in the Haber process, N2(g) + 3H2(g) ⇌ 2NH3(g)

3. Stoichiometry
3.1. Formulae

Deduce the formula of a simple compound from the relative numbers of atoms or ions present in a model or a diagrammatic representation

10. Chemistry of the envi...
10.3. Air quality and climate

State the composition of clean, dry air as approximately 78% nitrogen, N2, 21% oxygen, O2, and the remainder as a mixture of noble gases and carbon dioxide, CO2