https://amp.doubtnut.com/question-answer/how-to-study-physics-for-jee-mains-and-neet-exam--2265623

https://doubtnut.com/jee/jee-mains-weightage-chemistry

Dear aspirant,

Doubtnut has also given chemistry and physics but I think you must read the test book thoroughly rather depending on these apps. Reading text books is the only way out for base clearance. All the best for your exams and hope you have a bright and promising career in near future. 

Thank You