i hvae got air 79000,will i get into nit trichy or any nit's in southern region

Hey.
If your rank under the general category is 79000, then as per the previous year trends for admission in NIT Trichy for the general category, you don't seem to have any chance for admission under the Home state quota or the Other state quota. As the previous year cut offs are too high for this college.
You can use the link below to check out previous year cut offs for other NITs.

https://www.google.com/amp/s/engineering.careers360.com/articles/jee-main-cutoff

You can use the link below to predict colleges basec on your JEE scores.

https://engineering.careers360.com/jee-main-college-predictor

Best of luck