9701 MCQ Solution 19

Question 19: [Inorganic > Nitrogen and Sulfur]:

Which gas is present in the exhaust fumes of a car engine in a much greater amount than any other gas?

A carbon dioxide

B carbon monoxide

C nitrogen

D water vapour

Reference: Past Exam Paper – November 2002 Paper 1 Q19

Solution 19:

Answer: C.

The composition of air is 79% nitrogen. When this enters a car’s combustion chamber, it is mostly unreactive, and passes back out with the other fumes.