Chemistry Spl

It is a widely preferred group in 12th. The most preferred stream for PCM students is engineering. So if you want you can go for that.
In engineering, you can easily get jobs in IT firms. If you don't want in IT firms, then you must choose some core subjects like mechanical, EEE as they will give you a job in core companies which does not involve IT.

You are eligible to seek admission in IITs and NITs in Post graduation degrees by appearing in JAM examination conducted by IITs after B.Sc. IITs have a requirement that for seeking admission in M.Sc Chemistry candidate must have had Maths as a subject in 10+2 and chemistry as a subject in all six semester of B.Sc.

Yes, of cours. You need to have a good chemistry base for pursuing chemical engineering.

Following are the job opportunities in chemistry:
Analytical Chemist
Bio-medical Chemist
Chemical Engineering
Associate Industrial Research Scientist
Lab Chemist
Materials Technologist
Production Chemist
Production Officer
Quality Controller R&D
DirectorResearch & Development ManagerSafety Health and Environment Specialist

You cannot apply for BHU now as the dates are over.

What is Medicinal biology? PCB as an option for 11th class is for student who want to continue there further studies in medical, paramedical and other science stream involving chemistry, biology and physics.