Hi.

It took a while to translate your question into meaningful words. So,

You care absolutely right, due to reservation system based on Caste, candidates of SC/ST or even OBC Category have a better chance of getting a seat in college than a general candidate of the same rank. There is nothing that could be done, the only chance is to study harder, focus on yourself and aim for higher ranks.

Now for college placements, NO there is no distinction between an SC/ST Student or a General Student, they all are students of the same college and the placement package or interview success will be purely based on an individual's hard work and knowledge pool for that placement position.

I hope this answers your query.

Incase, you have a further specific query please feel free to ask

Best of Luck