Hi

With  51 percentile

• Your rank will be  around 501270 - 563500 as per our rank predictor at

  JEE Main Rank Predictor 2021 - Predict your JEE Main ...

  JEE Main Rank Predictor - Know your expected IIT JEE Main 2021 Rank by ...

Your sc rank will be around 40, 000.

With above  rank, you have very low   chances in NITs, IIITs.

For example

NITs

Under other state quota closing rank for some of the lower NIT for SC category is provided below as 6th josaa counselling 2020 :-

• NIT Mizoram :- civil engineering :- 8376 sc rank

• Nit nagaland :- Electronics and Instrumentation Engineering:- 8641  sc rank

• National Institute of Technology Agartala, Production Engineering :- 9207 sc rank

IIITs

Closing rank for some of the IIITs for which closing rank goes low are listed below along with their closing rank in the 6th round of josaa counselling 2020 for sc category  :-

• Indian Institute of Information Technology(IIIT) Dharwad, Computer Science and Engineering  :- 9297 sc rank

• Indian Institute of Information Technology, Vadodara International Campus Diu (IIITVICD), Computer Science and Engineering:- 10040 sc rank

• Indian Institute of Information Technology, Agartala, Computer Science and Engineering (4 Years, Bachelor of Technology):- 10226 sc rank

• Indian Institute of Information Technology Bhagalpur, Mechatronics Engineering (4 Years, Bachelor of Technology) :- 11133 sc rank

You can verify the above at

https://josaa.nic.in/Result/Result/currentorcr.aspx

Above prediction of is on the basis of past year data but  cut off/closing rank for colleges keeps changing every year depending upon many factors like number of students that appeared in the examination, difficulty level of the JEE main question paper for different shifts etc

To have a personalised report on your chances of getting a college you can go through our college predictor, it will give you complete list of colleges which you can get on the basis of the category you belong to,  your home state, your gender etc, the link for  jee main college predictor is provided below

https://engineering.careers360.com/jee-main-college-predictor?icn=QnA&ici=qna_answer

So , for IIITs you need at least around 11,000 sc rank and for nits try to get at least sc rank of around 9000 i. e at least around 85 percentile . To improve your score in remaining session of JEE main you should focus on your preparation go through previous year question papers ,mock test papers and to help you in your preparation we have jee main knockout out for you, for which  is provided below

https://learn.careers360.com/knockout-jee-main

Thankyou