What will be my rank if i get 60-70 percentile in jee mains..will i be qualified for jee adv(i am OBC)?

Dear Aspirant
It's difficult to get your rank as percentile and rank depends on various factors like difficulty of the paper,
Number of candidates appearing in the JEE examination, marks obtained by them and many more
Still 60-70 percentile will fetch you rank around 3 lac so don't worry wait for the official results. And as per previous year cutoff 68 percentile was the qualifying percentile for JEE ADVANCED in OBC category.
For your reference other category cutoffs were-
General- 87.. percentile
ST- 34... Percentile
SC- 46.. percentile
All the best