Is Maharaja Agrasen College in Hisar private / government?

No. Maharaja Agrasen College Hisar is a government aided college. 

In Government College all things are managed and are in charge or run by the government like curriculum, fee structure, study material, syllabus, etc. It is fully under the government and receives all the benefits of government schemes and policies.

Government Aided Colleges are run by the private management but it has the support of the government. Government provides funds to these colleges but it is not run by them. They also provide all government scheme scholarships and other benefits. Therefore, their college rules are not set by UGC or the Government. They are run by their dedicated rules, schemes, etc.