Hi

The Msc chemistry offered by BITs is an integrated course on class 12th basis dear and not a normal msc course on graduation basis . You can check the same on the of page of BITS Hyderabad the link for which the provided below

https://www.bits-pilani.ac.in/hyderabad/mschons

On going through the above link you will find that the very first line says that it is an integrated course in class 12th basis. And the admission is through BITSAT examination.

But after your graduation you cannot appear for BITSAT exam and thus can not get admission in integrated MSC chemistry offered by bits .

This is because,

Graduation is at least a 3 year long course, but for BITSAT , one is eligible for only two consecutive year starting from the year of passing 12th.

For your reference,

BITSAT 2021 examination eligibility criteria is provided below :-

=) you should be either appearing for 12th board examination 2021 or should have passed it in 2020 with PCM i. e physics chemistry and mathematics  (or PCB i. e physics ,chemistry and biology in case of students applying for B Pharma, PCM candidates are also eligible for B Pharma)

=) You should have got at least 75% marks in aggregate of physics chemistry  and mathematics ( if you have taken mathematics for your BITSAT examination)

or

at least 75% marks in aggregate of physics chemistry  and biology( if you have taken biology for your BITSAT examination)

=) you must have got at least 60% marks individually in each of physics, chemistry  Maths/ biology

=) There's no age limit to be eligible

You can check detailed information regarding eligibility at

https://engineering.careers360.com/articles/bitsat-eligibility-criteria/amp

Thank you