Chemistry Spl

Firstly, refer NCERT for PCM and try all the problems to get you basic concepts cleared and then go for reference books like H.C.Verma for Phy., M.L.Khanna for Maths and O.P.Tandon for chemistry. I would suggest you to join a coaching as it will assist you in preparing in a proper curriculum with weekly tests to evaluate your preparation.

You are not eligible for M.Sc CS / IT because of your non mathematics background. Although, majority of MCA colleges also have mathematics as mandatory requirement, but some universities such as IGNOU allows non mathematics students to do MCA. You may evaluate doing MCA from such colleges to fulfill your dream of becoming an IT professional.

Yes, you can get it. Meanwhile, it is recommended that you develop an experience of at least 3 years so that you can qualify for entry position into IIM's teaching faculty.

You can consider the below mentioned courses:
1. B.Sc zoology.
2. B.Sc botany.

MBA in HR will change your career from science to a non-science background and it will give high pay scale only if you pursue it from a reputed B-school. Otherwise, the starting salary would range from Rs.15k to Rs.20k per month. It can be more than that depending upon your capabilities.