Hello Ambady,
The admissions for B.Tech in Kerala Colleges other than IIT, NIT and other central institues are mostely based on Merit-list based on marks in CEE (Common Entrance Examination) conducted by the Commissioner for Entrance exams, Govt. of Kerala (http://www.cee-kerala.org)
Both the mentioned colleges are good options for Chemical Engineering.
All the best!
Candidates can check B.Tech Cut off for Top IITs & NITs here.
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