Yes, you would be eligible to attend the counselling 2019 to take (pec) chandigarh. You would be eligible for the same if you might have a good rank in JEE mains and advance and this would be decided according to the cuttoff for mains and advance 2019and the cuttoff expectedly for JEE will be out within 7 to 14 days. 

But relax, you will be eligible for the counselling if you have a good rank in JEE mains and advance.It really don't matters whether you have 60% or 90% in your 12th. What matters is that you are passed out with 1st division in your intermediate.