Hello ashutosh.

SVNIT is one of the famous NITs of INDIA.To get chemical engineering in SVNIT ,your category rank should be somewhere near 6500,to be on safe side.To score such a rank is not at all tough.Slight dedication is what you'll need.For nirma ,a rank of 23000 would do so.If you could improve your score,you can also aim for some other NITs too.Hope this was helpful.

Good Luck!