Hi

Yes, you are eligible for jee main examination with 70 % in 12th.

This is because,

There's no minimum % barrier in 12th to be eligible for jee main.

For your reference,

Jee main eligibility criteria is given below-

--------) Qualification required :- to be eligible  for JEE mains you need 10+2/equivalent qualification.

--------) Passing year :- one is eligible for JEE main examination for consecutive three years starting from the year of appearing for 12th /equivalent examination i. e to be eligible  for   JEE mains 2022   you should be either appearing for 12th board exam or equivalent  in   2022 or should have passed it in 2021 or 2020

--------) There is no age limit to be eligible

--------) there is no minimum percentage requirement to be eligible for JEE Main.

But yes,

To be eligible for NITs, IIITs, CFTIs one needs at least 75% marks in class 12th if belongs to General or OBC category  or at least 65% marks in class 12th if belongs to Sc or St category.

For this year i. e 2021 this minimum percentage requirement of 75% - 65 % was lifted off   .

But in 2022, yes this 75-65 % criteria for       NITs, IIITs, CFTIs will be there.

So, if you are from general category then I would suggest you to give improvement examination so that you can score more than 75% and be eligible for NITs etc

(  if 75 % -65 % criteria for NITs, IIITs,CFTIs gets removed in 2022 due to conditions like pandemic then nta will notify about it)

For detailed information about jee main eligibility criteria  go through our page, the link for which is provided below

https://engineering.careers360.com/articles/jee-main-eligibility-criteria

Thank you