D.A.V. College Jalandhar

That depends if there is a tie-up with your college and DAV college which permits lateral entries in the 2nd semester. You should check with the relevant authorities in your college whether lateral entries are permitted in the 2nd semester to another college. Being good in academics will work in your favour as it makes you capable of handling the pressures associated with transfers to a new college which entails getting used to a new environment, faculty, infrastructure, etc.

Yes, of course, it's a good college for B.Sc.

The procedure is different for different university. Most of the processing is online.
Some universities are taking admission by conducting admission test and some of them take admission by counseling process .
The counseling process should depend on your percentage of math in B.Sc.
Good Luck!!

Hi Gaurav,
You may refer to this college comparison tool provided by Shiksha:
https://www.shiksha.com/resources/college-comparison