Hey nishchal.

Here is a list of a few private top colleges for Btech in India.

Birla Institute of Technology and Science, Pilani

Thapar Institute of Engineering and Technology, Patiala

Vellore Institute of Technology

Birla Institute of Technology, Mesra

BMS College of Engineering, Bangalore

Manipal Institute of Technology, Manipal

PSG College of Technology, Coimbatore

Amrita School of Engineering, Coimbatore

Ramaiah Institute of Technology, Bangalore

RV College of Engineering, Bangalore

SASTRA University, Thanjavur

SRM Institute of Science and Technology, Chennai

Best of luck