my jee main rank is 300821 and my +2 pridected marks around 75% can i get admission in b.tech in mechanical

Hey Anmol, don't worry you can surely get admission in b.tech for ME branch. Although at this rank, getting IIT or NIT is not easy if you are in General quota, but you can surely get private colleges. If you would have mentioned your home state I would have suggested you a few colleges, but no problem we have a solution; Career360 provides a tool for college prediction. You just need to mention your correct details and it would suggest you suitable colleges based on your score. the link for the tool is https://engineering.careers360.com/jee-main-college-predictor. Moreover, Deenbandhu Chhotu Ram University of Science and Technology, Murthal offers Mechanical branch and has only 60 seats, there are fare enough chances of getting this college.

Hello anmol,
With this rank, you can not get any top private college.
For that you have to score good marks in jee mains.
You can try for private college in your location or according to your choice of comfortablity.
You may try in another exam for get admission also.
Hope it's helpful.
Thank you.