if you are not a person who is oriented towards computer science only then go ahead with chemical in nit durgapur it will give you a nit tag plus nit durgapur has a good alumni network which helps in placements and good level of competition is there in nit durgapur so if you are ok with chemical branch which does not have good prospects in india at the current moment then go with nit dgp chemical or if you are oriented towards cse only then go with iiit sricity ece as ece is somewhat related with cse but other institutes just for cse are not recommended though final decision is yours.