Hello Aspirant,

No there is no need to prepare for them separately because syllabus of IIT JEE comprises of class 11th and 12th syllabus so you need to focus on class 11th and 12th syllabus primarily and along with it there are some additional topics for IIT-JEE so you need to prepare for them simultaneously along with class 11th and 12th syllabus.

Now if you are going to start for JEE preparation then you can check out JEE-Main knockout package by Careers360 where you will be getting the quality preparation content at your doorstep by Careers360. You can check out JEE Knockout program from the link given below :-

https://learn.careers360.com/jee-main-coaching/?utm_source=%20QnA

In JEE Knockout program you will be getting :-

>>>> Fully customized time-table for setting your targets.

>>>> Concept based video lectures by experienced faculties.

>>>> Smart study material that includes most difficult concepts and asked topics and much more.

>>>> Unlimited mock test series for your practice.

>>>> Faculty support in the form of Live chats and QnA interactions to resolve the doubt of candidates.

>>>> AI based personalized learning.

I hope this information helps you.

Good Luck!!