Question

One litre of cool air weighs heavier than one litre of hot air because of the :

• A. Increased number of collisions between . the molecules
• B. Increased number of molecules at. low temperature
• C. Greater energy of molecules at high temperature
• D. Lower energy of molecules at high temperature

Answer 1

The correct option is B Increased number of molecules at. low temperature

Their exists less no. of molecules at the high temperature and high no. of molecules at the low temperature i.e. in the cold conditions.