One of my friends studied at Hansraj College. According to him, the Geology department is not up to the mark. Here’s mentioning some things that proved to be a disappointment for the students.

• The placements are underwhelming. No reputed organization ever recruits students from this department.
• The classes are irregular and no discipline or decorum is maintained.
• Since it has the curriculum standards of DU, students are put under a lot of pressure to mug up elaborate theories.
• The practical classes are uninteresting, basically because it is not much focussed on.
• Classes of B.Sc. Geology is held outside the main campus where students tend to feel alienated from others.
• They have very little exposure hence less placements.
• Lastly, there is no geology society, where you can learn specific things about the course, get in-hand training, etc. 

Therefore, if you want to do B.Sc. then opt for some other subject or you can do a BA or B.Com. from DU as they will provide better scope than Geology.