Hello aspirant,
If you want to do BSC in chemistry you can apply for the college providing the course ...in some of the colleges entrance exam are there and in some direct exams are there...
Colleges in India for BSC chemistry are..
. University of Delhi, New Delhi
. St Xavier's College, Mumbai
. Christ University, Bangalore
. Loyola College, Chennai
. Banaras Hindu University, Varanasi
Good luck.

Hello Rithik Goyal,
After 12th you can go for B.Sc hons. chemistry. Eligibility criteria for most of the top universities is you must be having atleast 60% aggregate marks in 10+2 (with English and Chemistry as a subject)

Focus in B.sc hons Chemistry is on the learning of fundamentals and advances in all areas of chemistry for correlating concepts with the scientific happenings and deep rooted concept building in budding chemists to harness their potential in research and higher studies.

There are very good universities and institutes which are offering these wide range of courses with good placements and career opportunities and industrial exposure also like Lovely Professional University, Birla Institute of technology, KIIT University, Jaipur national university and few others.

I hope it helps...

Hi Ritik
If you want to study back chemistry honours after 12 th.
You can apply for some government college  like Banaras Hindu University, Allahabad University  , DTU etc .
For that you have to apply online for every college separately . After results you have to attain counseling   to get admission.
You must apply in official website.
Thanks