Dear Abhijeet, for studying MBA, you need to appear for an entrance examination. It can be CAT, XAT, SNAP, ATMA, GMAT, etc. For all these entrance examinations, having a Bachelor's degree in any discipline is good to go. So, even if you want to pursue MBA IT you studying B.Sc Chemistry is absolutely fine. You have to select your specialisation in your 2nd year. You are eligible for MBA IT with B.Sc Chemistry as your qualification.