If you are a Civil student, my advice to you would be to prepare for the GATE exam once you are done with your degree. The placement is quite low for core companies. Many students also follow the same.

Chemical students are known to focus on jobs and have a good placement in analytics and software-based companies. Many of the top ones also land core jobs.

My suggestion would be to check the syllabus and pick the subject you like. You will realize which subject has good scope and what does not. As far as Civil is concerned, most students land jobs at L&T. But, they will make you work a lot and you will not be satisfied with the pay. This is not the case with Chemical engineering.