Hii..

There are some eligibility criteria to get admission in DU for B.com and these are..

an aggregate of 60% and more are required in Hindi /English and combinations of three other subjects mathematics,accountancy , economic and business study/ commerce

inclusion of other subject than these three subject will lead to deduction of 1% per subject on aggregate with the maximum net detection  of 2% so as your subject is physics chemistry and other  so unfortunately you have to face the disadvantage of detection of marks..

https://university.careers360.com/articles/du-bcom-eligibility-criteria

All the best!!