Q. Which of the following gases is heavier than oxygen?
Answer: Carbon dioxide
Notes: Carbon dioxide has one carbon atom and two oxygen atoms, and a molecular weight of 44 grams per mole. The oxygen in the air is actually O2, or molecular oxygen, with a molecular weight of 32. Hence, carbon dioxide has a higher density, or is heavier than oxygen.

This question is part of 40000+ General Studies MCQ Series Course on GKToday Android app. Question Number: 41 in Chemistry-3-Elements in above course in App.