hai ashutosh gupta, for kind information giving admission based on 12th % was gone ere now we were in a highly competative world may be there are colleges i can surely say that those colleges will be very poor of conduct better take any entrance exam get good college for bright and happy future

hi,
You not get admissions in top college for B.Tech course on the basis of 12th class marks.
Some college with give you admissions on the basis of 12th marks:-

Sri Sai College Of Engg & Technology, Badhani, Pathankot

Lovely Professional University Jalandhar 

DAV Institute of Engineering & Technology Jalandhar Jalandhar

Baramulla Engineering Colleges

Jammu Engineering Colleges

Srinagar Engineering Colleges

Udhampur Engineering Colleges

good luck!