I have got 70% in 12th 

And my caste is sc 

My SC rank is 15000 and crl rank is around 1 lack .will I get any collage

Are you asking JEE Main Paper II cutoff? The cutoff varies every year depending on the various factors like difficulty level of the exam, No. of candidates appeared for the exam, performance of the candidates in the exam etc. so it would be tough to tell you the exact, You can check the previous year cutoff to take an idea about your admission possibilities with the given below link.

https://engineering.careers360.com/articles/jee-main-cutoff-for-b-arch-b-planning

Good Luck!