Multiple choice Which of the following pair of gases are main contributors in formation of acid rain? Methane and Sulphur Dioxide Sulphur dioxide and Nitrous oxide Methane and ozone Carbon dioxide and Sulphur dioxide All of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation Two gases which contribute to acid rain are SO2 (sulfur dioxide) will make sulphuric acid. NOx (oxides of nitrogen from combustion) will make nitric acid.