i get 85 percentile in jee mains in which goverment engeenering college i can go

I am not sure about goverment colleges but you can easy get good private college according to your marks.

According to the Above percentile (85) , your predicted rank is  around,153450 - 172500

Some colleges are

LPU Jalandhar - Lovely Professional University

Amrita School of Engineering, Coimbatore

HBTU Kanpur - Harcourt Butler Technical University

Dr Ambedkar Institute of Technology, Bangalore

JNU Delhi - Jawaharlal Nehru University

GNDEC Ludhiana - Guru Nanak Dev Engineering College

Government Engineering College, Ajmer

KNIT Sultanpur - Kamla Nehru Institute of Technology

You can visit this link for see  government college in india

https://engineering.careers360.com/colleges/list-of-government-engineering-colleges-in-india-accepting-jee-main

And also you can visit privet college from this link

https://engineering.careers360.com/colleges/list-of-private-engineering-colleges-in-india-accepting-jee-main

You can also predict your rank and college

JEE Main College Predictor link
https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

JEE Main Rank Predictor
https://engineering.careers360.com/jee-main-rank-predictor

Thank you. I hope this answer helps you.