In order to apply for M.Sc in Chemistry, Mathematics, Physics, Zoology, Botany:
Eligibility criteria

General candidates

B.Sc. (Hons.) graduates in the subject concerned under 10+2+3 pattern or its equivalent with at least

Physics and Botany

50% marks in Honours subject in case of Physics and Botany

Chemistry

45% marks in Honours subject in case of Chemistry with pass marks in Mathematics at subsidiary level.

Mathematics

45% marks in Honours subject in case of Mathematics

Zoology

55% marks in Honours subject in case of Zoology

You can check the further information with the given below link.

http://www.visvabharati.ac.in/Courses.html

In case you have any other query then let me know.

Good Luck!