Shall I switch my college to a private college for B.Sc honors in chemistry? I am a student of B.Sc biotech (1st year) in a govt. college.

Why do you want to change your college for B.Sc in chemistry as you are doing B.Sc in biotechnology so it has really a good scope in future so don't worry about the college and study in the source you have and try to score good and achieve sometimes better from them. All the best!