Chemistry · May / June 2017 · Paper 12 · Question 33
Which list contains only gases that are always present in unpolluted air?
- Aoxygen, nitrogen, carbon dioxide, argon, carbon monoxide, nitrogen dioxide
- Boxygen, nitrogen, carbon dioxide, argon, neon
- Coxygen, nitrogen, carbon dioxide, nitrogen dioxide, ozone
- Doxygen, nitrogen, carbon monoxide, methane, sulfur dioxide
As printed in the paper
Show the answer
Correct answer: B. oxygen, nitrogen, carbon dioxide, argon, neon
Make a free account to save your answers and see your weak topics and ask the AI why a wrong answer is wrong.