Chemistry Spl

You can try for chemical engineering or CSE.

Delhi University, AMU, BHU, etc. are some of the best colleges for M.Sc in chemistry.
Good luck!

Please visit the given website:
https://www.quora.com/What-are-courses-available-in-chemistry-after-12th

Zoology. Go ahead with Zoology as you are interested in wild life and forest.
All the best.

Dear,
With compartment few private universities can give you provisional admission till your compartment result but you need to clear the main subject in compartment result.
Major and established Universities will not give you Admission on the basis of compartment.
All the best.

Go for PhD in a subject of your interest, if you really want to study abroad then you need to clear GRE or any other requirement by the country you want to study in.

You can either try for job or go for higher studies. Doing M.Sc/ MBA after graduation will help you to get lucrative job offers. Some of the areas that offer jobs for a B.Sc degree holder includes Laboratories, Medical Research, Petroleum Companies, Pharmaceutical Companies, Power Generating Companies, Pyrotechnics Manufacturers, Research and Development Firms. Companies like Dabur, Hindustan Lever, Ranbaxy also hires B.Sc graduates.