Engineering
Chemistry
Average Atomic and Molecular Masses
Question
The average molecular mass of dry air and moist air are M1 and M2, respectively. The correct relation is:
Know your College Admission Chances Based on your Rank/Percentile, Category and Home State.
Get your JEE Main Personalised Report with Top Predicted Colleges in JoSA
Solution
Water vapour has molecular mass of 18, which is lower than dry air molecular mass (M1) so on mixing in air, molecular mass will decrease, M1 > M2