Dear Sanadh
Yes,  you can apply if and only if, your education qualifications satisfies below criteria.

Candidates should have passed the class 12th examination of 10+2 system from a recognized central or state board or its equivalent with Physics, Chemistry, and Mathematics and adequate proficiency in English.
They should have obtained a minimum of aggregate 75% marks in Physics, Chemistry and Mathematics subjects (if taken Mathematics in BITSAT) or a minimum of aggregate 75% marks in Physics, Chemistry and Biology subjects (if taken Biology in BITSAT) subjects in 12th examination, with at least 60% marks in each of the Physics, Chemistry, and Mathematics/Biology subjects.

If you want to apply for BITSAT, you need to go through their official website.  And the application form will be likely released on the last week of this month.
If you want more details like application form,  hostel,  ratings etc.., click on the below link
BITSAT 2018
All the best.

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