JEE

Kindly follow the predictor below :
https://www.resonance.ac.in/reso/news/JEE-Main-Branch-Predictor.aspx

Hello Sajas,
It's a very crucial question. On one hand it gives enough time to study in a scientific manner and enhance chances of clearing JEE. On the other hand, monotony may set in which is counterproductive. In perspective of one's life, one year is very insignificant. If you are confident of perseverance at sustained studies you should definitely consider that option if taking break for one year.
Best wishes.

If that particular college asks JEE Mains score for admission then you need to crack JEE Mains to get into that particular private college. It depends on students opting for that college whether 70% is fine to get into it or not.

Keep revising the concepts learnt in 11th and 12th.

Both are equally important as you will be in 12th when you will write JEE exam. You will have a good grasp of concepts of 12th as it is board exam, so you need to concentrate more on 11th at that time. You should not loose on what you learnt in +1.

Following are the important topics:
1. Integral calculus
2. Vector 3D
3. Modern physics
4. Rotation
5.Thermodynamics

I agree with Shweta at some points but will suggest, you go for a coaching class as it provides a competitive environment and proper study pattern. Also, it will be more helpful if you go for Catalyser or someone similar.

Every coaching which prepares students for IIT-JEE gives coaching to droppers.

Hello Dhruvil,
If you have scored 51-53 % in GHSEB, you are actually not eligible to appear for JEE, since to appear for JEE you must score at least 75% in class 12th. I therefore, suggest that you review your situation with a cool mind.