Dear ABHIJIT MAJHI, NCERT solutions will help you to collect the basics of all JEE subjects. NCERT books are the best books for JEE MAIN but they are not enough as they don't include revision of complex JEE questions. Last year most of the JEE (January  session) questions is taken from NCERT. Most of JEE question are from NCERT level only.

Along with NCERT you can also refer these books to score a good marks

for physics, 1. HC VERMA (concepts of physics volume 1 and volume 2 )  2.HALLIDAY & RESNICK (fundamentals of physics) 3.DC PANDEY (understanding physics set of 5 books) and also refer previous years chapter wise topic wise solved papers

for chemistry,  1.DR.R.K.GUPTA (a textbook of physical chemistry)  2.DR.O.P.TANDON (a textbook of organic chemistry)  3.RANJEET SHAHI and also refer previous year chapter wise topic wise solved papers

for mathematics  1.R.D,SHARMA (objective mathematics volume 1 and volume 2)  2.RAVI  PRAKASH, AJAY KUMAR, USHA GUPTA (complete mathematics (TMH))  3.DR.SK.GOYAL , AMIT M AGARWAL (Arihant skills in mathematics - set of 7 books)

utilize this lockdown time and prepare yourself ready for the examination

Hey!

NCERT books are the most recommended books for the preparation of Jee Mains, but is only useful to understand the  basic concepts. Level of Jee Mains questions is better than the questions of NCERT, so you must go through the other books to learn about the pattern of questions and to learn some tricks, so that you can manage you time in exam.

Thank you.