Since both of these branches are completely different from each other, you should go for what you like.

After taking any engineering course, only placement and college doesnt matter. What matters how well you are interested in that course and give your best.

As far these courses are concerned both of these are pretty good in terms of college as well as placements.

If you like semiconductor part then u should go for IIT BHU electronics other wise go for IITD Chemical.