GATE

Hello,
As per the regulations issued in 2015, admission to any technical courses requires you to qualify in the respective entrance examinations. Apart from GATE entrance examination, there are a lot of other entrance examinations which are comparatively much easier and you can get qualify in them and secure a seat in a good college for chemical engineering. Different states conduct their own entrance examinations for admission into private colleges in a state, for example, OJEE for Odisha, PGECET for Karnataka, Andhra Pradesh, Telangana, TANCET for Tamil Nadu, WBUT for West Bengal, etc. Further, some private universities like SRM University, KIIT University, VIT University, PES University conduct their own entrance examinations. You can appear for these as well.

Hello Biswajeet,
Dropping more than a year is not considered beneficial considering the level of competition that has evolved in every sector of the corporate world. If you could not score good enough in GATE, you could try appearing for other entrance examinations. Different states conduct their own entrance examinations for admission into private colleges in the respective states like OJEE in Odisha, WBUT in West Bengal, PGECET in Andhra Pradesh, Telangana, Karnataka etc. Besides certain private universities like SRM University, KIIT University, VIT University, GITAM University conduct their own entrance examination. You could try for these as well. On a personal note, I would not recommend dropping another year for GATE preparation.
I hope this answers your question. If you have any further questions, kindly revert.