As you have less time reading whole NCERT for physics will not be a intelligent work.
NCERT for chemistry and biology will be enough .And for problems in physical chemistry and organic solve previous years. For inorganic NCERT is more than enough.
For Physics:
I will suggest you to solve all previous years questions and look for theory for only the question which you are to solve .
This is the fast method to cover the syllabus in less time and you will automatically go through the important concepts from which questions in actual exam are probable.

NCERT for Physics and Chemistry

Introduction
NCERT is a popular textbook for students of different classes in India, including for Physics and Chemistry. The books cover a range of topics in these subjects, including theory and practical applications. However, the question arises whether NCERT is enough for Physics and Chemistry or not.

NCERT for Theory
NCERT is an excellent resource for learning the theoretical concepts of Physics and Chemistry. The books are written in simple language, easy to understand, and cover all the topics required for the exams. The books are recommended by CBSE and many other educational boards in India, making them a reliable source of information.

NCERT for Problem-solving
While NCERT is an excellent resource for learning the theory, it may not be enough for problem-solving. The books have limited problems, and students need to practice more problems to gain confidence in applying the concepts. Therefore, students may need to refer to other resources, such as reference books, online platforms like EduRev, and coaching centers, to practice more problems.

Conclusion
In conclusion, NCERT is an excellent resource for learning the theoretical concepts of Physics and Chemistry. However, it may not be enough for problem-solving, and students may need to practice more problems from other resources. Therefore, students should refer to other reference books, online resources, and coaching centers to supplement their learning.