Hello Himaja,

Since you have not mentioned the region or the stream, I will provide you with generally top ranked B.Tech colleges in India.

• Indian Institute of Technology, Bombay
• Indian Institute of Technology, Kharagpur
• Indian Institute of Technology, Roorkee
• National Institute of Technology, Trichy
• Vellore Institute of Technology, Vellore
• Birla Institute of Technology and Science, Pilani

There are many other similar colleges in different regions of the country. Note that, you need to answer an entrance test JEE Mains and score 500+ to get admission in these colleges.