Dear Anshumika ,

Yes, you are eligible to apply NTA UGC NET in environmental sciences after M.sc in Chemistry . Minimum eligibility criteria to apply for UGC NET is minimum 55% marks in your masters degree  .There are 5% relaxation of marks for OBC/SC/ST castes .

Make sure that you have passed your masters or if you are in your final degree of M.Sc , you can provisionallly admitted but eligible for JRF or Asst prof, you should qualfy your M.Sc with min 55% marks .(For Gen) .

In subject choice case , if any candidate has zoology/botany/ chemistry / EVS in their M.Sc ,then they are eligible for  applying UGC NET in EVS .

You can refer to this article for more information:

https://competition.careers360.com/articles/ugc-net-eligibility-criteria

Hope it helps !!

Best wishes !!