Yes, B.Tech in Chemical Engineering is available there in Amrita, Coimbatore so if you have maximum interest in this branch and if you can give the best to it then you  should go ahead for the same. Also, you can check the scope of Chemical Engineering branch below -

Chemical Engineering was originally developed for the production of chemicals on an industrial scale. If you see the placement statistics of most universities, except for the IITs, NITs and other institutions of national repute, there are hardly very few companies coming to hire Chemical Engineering graduates during placement sessions in comparison to CS, IT, ME, ECE branches. However, if you are really interested on getting a job in a core company, work hard by creating good networks and contacts through internships and projects, maintain a good GPA because this would be very important for you as Chemical engineers find work not just in chemicals industry, but also in pharmaceuticals, oil and gas and manufacturing sectors. Also, if you are not interested in working in an industrial setting, you can try for jobs in EPC companies.

Apart from this, you can search jobs in Oil and Gas, Energy companies like Reliance Industries Ltd, Schlumberger, Shell, Cairn etc Government ones like BPCL, ONGC, IOCL etc there is a demand of Chemical Engineers in Pharmaceuticals companies like Dr.Reddys Labs, Biocon Chemicals, TATA chemicals also and Frost & Sullivan consulting firms also hire the same.

Good Luck!!!