Hello Student,

See I don't know why are you asking for old NCERT books because new ones have much more information than older ones. However you cannot get that old version NCERT book of bio in local book shop you have to go no to some metropolitan cities book shops you probably can found that there like for West Bengal it is Kolkata. However you also can find that by searching it online. It also can be available in some Ecom websites for sale.

Hi

Which board are you from?
Anyway,
It is CBSE board which uses NCERT for its curriculum, so I am guessing you from CBSE board. If not then do let me know
The link to download 10th cbse sample papers of science and other subjects as well is given below:-

https://school.careers360.com/boards/cbse/cbse-class-10-science-sample-papers

https://school.careers360.com/boards/cbse/cbse-class-10-sample-papers

Solving these papers will be very beneficial for you, it will help you to :-

------) know the pattern  of the examination.

------)  know the kind / types  of questions which are there in your  examination.

------)  it will give you an idea of the difficulty level  of  the examination .

------)  you  will get to know the important   topics  which  are  covered and asked often in the exam , so  that  you  can  accordingly plan for your examination.

------) it  will  help  you  to check and gauge your level  for  preparation for the examination,

------) it will let you  know  your areas or the topics you are weak at so that you can work on them  and   can  perform  even better in your examination.

------)  will   help you to improve your time management skills so that in your actual examination you can solve questions with better speed and accuracy .

Good luck for your examination preparation.

I hope that you find this helpful.

Thank you

Hello.

You can look up the course you have in your 11th and 12th standard, by looking up at the syllabus and what all are included in it. You can find the syllabus on the official website of the board or you can also get it from your school. There you can find what chapters are included in the NCERt book of 11th and 12th standard.

Hello aspirant,

The chapter is too much easy to understand, don't worry, I will forward a link, so that your understanding stands much easy instead of tree diagram write them on your notes, and remember most important part of the information. All of them is not important. https://ncert.nic.in/textbook/pdf/kebo102.pdf . This is that pdf. Instead of directly going into tables, read the theory first. If still you cannot understand comment the same, I will definitely explain you then. :)

Dear aspirant,

If you were to take my opinion , I would recommend you to practice more and more from wherever possible. Once you need to study thoroughly and memorize everything properly then attempt your previous year questions and questions from other books or magazines.

In addition to it you should also take the test series of Allen because the marks obtained in it would be very accurate and in the mains examination you would surely get around that.

For more information you can check out the link given below-

https://engineering.careers360.com/articles/jee-main-important-topics-books