Dear Student,

No subject is hard if you have interest in it. Taking tha case of Physics, so some topics you will find from your 12th class. But this time you will find them at a very wider level. And also some quite new topics are here. But if you are good at doing numericals and derivations then you will find BSc Physics interesting. And having a interest in physics means there will be no difficulty.

Taking the case of Chemistry, then surely the chemistry portion will be at more wider level than 12th. You will find some quite new concepts here. And let me clear you if you have interest in chemistry from the very starting then it will seems so easy. You will find it, the easiest subject among all others.

Hope this helps.