Hi

There are several entrance exams for btech. The most widely accepted entrance examination is jee main including nits, iiits & gftis.

The best books which you can follow for the preparation of your JEE  examination  are provided below:-

>>>>>> PHYSICS :-

• * NCERT Textbooks - Class XI and XII for physics

• *Concepts of physics Vol I and II by HC Verma :- the best book for mastering physics for jee preparation

• *Understanding Physics by D C Pandey

• *Problems in General Physics by I.E Irodov

>>>>>> CHEMISTRY :-

• NCERT Textbooks - Class XI and XII :- master it as many times questions have been  directly asked from NCERT concepts

• *Modern Approach to Chemical Calculations by R.C. Mukherjee:- best for practicing numericals in physical chemistry

• *Organic Chemistry by O P Tandon:- best for clearing all your doubts in organic chemistry

• *Concise Inorganic Chemistry by J D Lee:- Best for your inorganic chemistry.

>>>>>> MATHEMATICS :

• *Maths XI and XII by RD Sharma :- good for clearing your basic concepts along with NCERT

• *Complete mathematics by TMH

• *New pattern mathematics for JEE by Arihant publications

You can get detailed information regarding best books for JEE Mains  list at

https://engineering.careers360.com/articles/best-books-for-jee-main

Also follow the below tips :-

----------------------------------) More than the books you follow what matters is the way you follow them so while going to the chapter focus on understanding the concept go through solved examples and then go through exercise questions

---------------------------------) Never pile up your doubts, you should get them cleared otherwise it will be very difficult for you to understand the topics/concepts

---------------------------------) Solve previous year question papers , it will help you a lot as question based on the same concepts has been seen to be repeated very often in JEE main examination

--------------------------------) Solve mock test papers :- it is very important because it tells you whether you have prepared well for the examination or not and it will also let you know your weak areas so that you can work on them in order to perform better in your actual exam.

To  help you in your preparation, we have jee main knockout, the link for the same is provided below

https://learn.careers360.com/knockout-jee-main

Best Regards

ADITYA KUMAR