dear Pranav Pratiyush,
yes a chemical engineering student of final year or passout can apply for combined defence service exam .
here I am giving you the eligibility condition for cds-
Officers Training Academy (OTA - women, Non-Technical)
Unmarried and widow
Degree of a recognised university or equivalent
Officers Training Academy (OTA - men)
Unmarried and married
Indian Naval Academy (NA)
Unmarried
Degree in Engineering from a recognised university/institution
Indian Military Academy (IMA)
Air Force Academy (AFA)
Degree of a recognised university (with Physics and Mathematics at 10+2 level) or Bachelor of Engineering
if you want to know more information about the the cds exam then you can go through the below link
https://competition.careers360.com/exams/cds
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