B.Com

Yes, you can pursue B.Ed course after B.Com for pursuing B.Ed. You have to clear your graduation in any stream with minimum of 45% mark.
Here are some of the name of colleges which provides B.Ed course:-
Bangalore University Directorate of Correspondence Courses and Distance Education
Bharathiar University - School of Distance Education
Andhra University School of Distance Education (AUSDE), Visakhapatnam, Andhra Pradesh
Annamalai University Directorate of Distance Education (DDE)
Indira Gandhi National Open University (IGNOU), New Delhi
Jamia Millia Islamia Centre for Distance and Open Learning (JMI-CDOL), Delhi
Bharathidasan University - Center for Distance Education
Himachal Pradesh University International Centre for Distance Education and Open Learning, Shimla, Himachal Pradesh
Kakatiya University School of Distance Learning & Continuing Education, Warangal, Andhra Pradesh
Utkal University, Odisha

What do you want to do exactly? Social work or social entrepreneurship? If you want to do social work the best institute is TISS. It offers MA social work and admission is based on entrance exam announcement for entrance happens in around October and admission process starts by April next year. Alternate option is Nirmala Niketan, Mumbai and recently started MSW in Rajiv Gandhi Institute of Contemporary Studies, University of Mumbai, Kalina campus. Admission here too through a written test and not tough as this is recently started. If you are planning MBA in Social Entrepreneurship, then you may either opt TISS 2 years full time MA social Entrepreneurship or NMIMS 2 years MBA in Social Entrepreneurship in part time mode. Admission is through written test and currently over.