An environmental chemist is calibrating a high-precision gas chromatograph using a sample of clean, dry air collected at sea level.
Which of the following options correctly ranks the five most abundant gases in Earth's modern, dry atmosphere in descending order of their volume fraction?
N2>O2>CO2>Ar>Ne\text{N}_2 > \text{O}_2 > \text{CO}_2 > \text{Ar} > \text{Ne}N2>O2>CO2>Ar>Ne
N2>O2>Ar>CO2>Ne\text{N}_2 > \text{O}_2 > \text{Ar} > \text{CO}_2 > \text{Ne}N2>O2>Ar>CO2>Ne
N2>O2>Ar>Ne>CO2\text{N}_2 > \text{O}_2 > \text{Ar} > \text{Ne} > \text{CO}_2N2>O2>Ar>Ne>CO2
O2>N2>Ar>CO2>He\text{O}_2 > \text{N}_2 > \text{Ar} > \text{CO}_2 > \text{He}O2>N2>Ar>CO2>He
Practise Edexcel GCSE Chemistry Earth and atmospheric science with exam-style questions for Foundation and Higher tier. 62 questions, matched to the Edexcel GCSE Chemistry (1CH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
