Choosing streams like Industrial Chemistry can be tricky. Generally, students don’t even understand the scope of the basic courses, let alone a specialized course like chemistry. Don’t go for such a course if you are not well-informed about the career prospect.
If you are interested in civil engineering then don't waste time and apply to the new IITs. It is difficult to decide whether you are interested in a particular field. To find out you can get in contact with Civil Engineering graduates from good universities. Ask about their nature of work and growth in the field, etc. See if that sparks your interest. Also, you will have the option to go for GATE and appear in IES.