Pondicherry University

Viswa bharathi is best for Msc chemistry than Pondicherry University.

No, I think that won't be enough. First of all, it totally depends on the cut-off set by the institution. Although you have scored well then also it will depend on the performance of others.

The eligibility criteria of M.Sc. Biotechnology at Pondicherry University is as under:
Bachelors degree in Agriculture/ Biochemistry/Biotechnology/ Botany/ Microbiology/ Veterinary Science/ Zoology or in other related areas with a minimum of 55% of marks.
Admission process :- Students are admitted based on merit on the All India entrance examination conducted by Jawaharlal Nehru University, New Delhi.

If your aim is only to get a MBA finance degree you join IGNOU and in the mean while you can prepare for NET which you can appear which you are doing your MBA. For distance MBA go for IGNOU, SMU.

Yes, Pondicherry University conducts entrance exam for all PG courses in the last week of May. The minimum eligibility criteria is as under:
a Bachelor degree in relevant stream with at least 55% marks.

No institution is a bad or better one. It depends on study environment and exposure and this institution is goid in these aspects. Thing is the environment there must be working to you then it will surely be best for you.