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)
Paramjeet verma
Mcquarrie is one of the standard books for Quantum chemistry. Many examples as well as Revision problems are also there in that book. It will be good to practice numerical problems from there. Infact solution manual of this book is also available on internet. You can also refer Atkins' physical chemistry. Indian author books like K L kapoor, Puri Sharma Pathania are well enough for the numericals practice. There is no need to look beyond than this. This will be enough for your practice.