Chemical engineering and architecture which is best in nit trichy??
Both the branches are equally good but as per my opinion B.Arch is now growing and need of highly good architect is needed nowadays. So if your jee paper 2 was quite good for nit trichy go for it.
If you get chemical engineering in NIT trichy that's also good you'll get it by scoring in jee paper 1 it also have good scope now.
Choose according to you interest.