Hello,

Since you're from a commerce background, you are not eligible to pursue B.Tech. B Tech is an engineering course and it is mandatory for the Candidate that he/she must have pursued Mathematics Physics and Chemistry as core Subjects in 12th and the Candidate must have scored 50 percent (depends on the University or Institution you're willing to take admission into) in the qualifying exam. Moreover, you will have to appear in some entrance exams like JEE MAINS or some Institute level entrance exam.

Good Luck.