Hi Himanshu,

There is an eligibility criteria of JEE paper that is for admissions to NITs/ IIITs/ GFTIs, candidates should have secured at least 75% marks in class 12th exam or be in the top 20 percentile in the class 12th exam conducted by the respective board. For SC/ ST candidates, the eligibility criteria is 65% marks in class XII. So if the criteria is achieved then you are qualified for this exam.

All The Best!!!

Thank You

Less in chemistry means you should be atleast be scoring 10% or 12 marks in chemistry to qualify jee adv.