CBSE 12th

For B.E / B. Tech course , the cut-off mark required for a seat in P.S.G. College of Technology is pretty much on the higher side. Exact marks required for each department varies each year but Maalini Kumaran 's answer roughly gives you the range. As pointed out, the Category you belong to, is a deciding factor.
However , for M.Sc 5 year integrated courses , the admissions are not merely based on the cut-off marks scored in your 12th exams. The department usually conducts an interview to select the candidates. Though your 12th marks are given some weight-age (usually,less), importance is given to your understanding of concepts.
Personally I feel that the MSc courses are well- structured and the placements are also in par with the B.E/B.Tech students.

Hello Minhaj,
These days in almost all the states in India more than 40% seats in engineering colleges are not getting filled. Hence if you apply for admission in that state where you are domiciled you are bound to get admission in an engineering College somewhere or the other, but I would like to advise you to desist from doing so since there are no job prospects for engineers in general. Last year more than 50% of the fresh engineering graduates could not find jobs. In view of this I would like to advise you to go for graduation in the subject which you like the most so that you will enjoy studying get good marks and subsequently after graduation get a job also. Best wishes to you.