Hello aspirant,

It is difficult to say whether 70% in JEE mains may help you secure a seat in top college.If you score well above cut off marks it will help you to fetch a seat in college and branch of your choice.Kindly check the previous year's cut off trends.

The eligibility criteria for JEE mains is that a candidate belonging to general category must get 75% in 10+2 and 65% for OBC/SC/ST/PWD categories.Intermediate marks has nothing to do with securing a top college.It just help you to fullfil the criteria.I hope this is helpful to you.