Hi Himanshu!

Yes, you can apply for AFCAT exam, if you are pursuing BSc in Chemistry (Hons). According to the eligibility criteria, candidate of any bachelor's degree can apply for AFCAT, provided he/she must not have any backlogs at the time of application. Other than candidate must have atleast 60% in bachelor's and in 12th class. To know more, visit here:

AFCAT eligibility criteria 2022 - Qualification, Nationality, Age Limit, Physical Standards (careers360.com)

Thankyou!