Hi dear,

            It is not necessary to pass B.Sc with honours to get admission in M.Sc course. You just need 50-55% to get admission in M.Sc. course in various colleges and universities. Almost every university conduct their admission test to give admission to candidates for their M.Sc courses. The Joint Admission Test for M.Sc. is an admission test to Master of Science and other post-graduate science programs at the Indian Institutes of Technology, Indian Institute of Science. 

There are some private universities too which give direct admission in M.Sc. on basis of your B.Sc marks. The eligibility criteria for admission in these colleges and universities is 55% in B.Sc.

All the best