Dear aspirant !

Hope you are doing great ! Yes definitely you can still get 90 percent in next exams by giving your hundred percent but definitely it will very tough for you ! As we all know chemistry paper is very easy and scoring and you score very less in that ,now maths and physics as expected can be tougher than chemistry so again hard for you to score . So everything will depend on you , more you work hard ,more better result will come . And i would like to say again YES you can still achieve 90 + marks . JUST DO HARDWORK !

Hope it helps you !

Thank you