Hello Aspirant,

With 49 percentile your general rank will be around 5,90000. and your ST rank will be around 14,000. Marks vs ranks varies every year depending upon many factors such as difficulty level of questions, no of students appear for the exam, no of students want to get the the same branch. It is little difficult to get ECE, CSE, IT like high deamanding branches in top NITs, IIITs.

Here are some colleges based on your rank as per previous year cutoff :

1. I.K Gujral Punjab Technical University (PTU)
2. Chandigarh College of Engineering and Technology
3. Dr. S. S. Bhatnagar University Institute of Chemical Engineering and Technology
4. Govind Ballabh Pant University of Agriculture and Technology, Pantnagar
5. Department of Technology, Shivaji University

You can check out rank vs marks vs percentile from the below link:

https://engineering.careers360.com/articles/jee-main-marks-vs-percentile

Use this JEE college predictor to get list of colleges based on your score:

https://engineering.careers360.com/jee-main-college-predictor?utm_source=qna&utm_medium=jee_cp

Visit this page to get more information about previous year's college wise, branch wise cutoff:

https://engineering.careers360.com/articles/jee-main-cutoff

Hope this information helps you.

Best wishes!