Hey there
All the colleges you have mentioned are good but NIRMA is best out of them. See NIRMA is a national brand now and the college has good academics and placements for chemical engineering. Though the college has not chemical engineering as it's best placement branch.
Check out the link
https://www.google.com/url?sa=t&source=web&rct=j&url=https://www.careers360.com/university/nirma-university-ahmedabad/amp&ved=2ahUKEwjWsOLiybXrAhVSxzgGHZkMAsEQFjAAegQIBxAD&usg=AOvVaw2OZB5oZxNWNAU_Bz23lme3&cf=1
Good luck
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