A certain mixture contains gases according to the following proportions. Name the first two gases if they are arranged in the decreasing order of their proportion.
Sulphur, Carbon dioxide
Sulphur, Oxygen
According to the pie chart, sulphur dioxide has the highest content which is 50%. Carbon dioxide has 25%. Nitrogen and oxygen together have 25%. Hence the first two gases when arranged in the decreasing order of their proportion is sulphur dioxide and carbon dioxide