Actually Bhaskar Sharma,both of them has good scope.It all depends on the domain where you are work from.Mechanical has large number of competitiors while chemical has less competition,so you have to choose between the two.I would suggest you to gor for the chemical engineering in a descent ranked college as they have more varied scopes.

T hanks for connecting.Team careers360.

Hi Bhaskar,
There is no set best stream of Engineering. I would suggest you to go for the stream that attracts you the most. Engineering is tough and you need to bear with it for four long years. If the interest fades away it will definitely lower your marks as well as the knowledge growth. And that will help you grow your career and give you the best jobs. So learn everything with your heart and go through the syllabus of both. Whatever peaks your interest, choose it.
Both have descent scope in today's business world.
All the best.