Hello Gunaseelan ,

First of all I want tell you always go for interest scope will follow you.

Chemical engineering has wide scope in indica if you will pursue it in prestigious colleges like it's nit's and other good ranking college

After b.tech you can get placed in MNC companies like ONGC,BP, HP, Reliance industries limited ,National fertilizers ,Aerofyne polymers, larsen and turbo and other companies

You can also go for higher studies than can become a professor

You can qualify the gate exam and can get entry in PSU's

Good luck!