Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Suman Kumar
https://doubtnut.com/question-answer-chemistry/sum-of-molecular-mass-of-gas-a-c-is--20594516 see this video Roni