B.Sc

You can write exams, and if you are a candidate for scholarship, you can be a recipient. But, in most colleges that process comes after securing admission.

M.Sc chemistry involves lectures as well as labs that run for the total time of 4 hours. It is complete full time course. The credit often includes conducting a project all by ourselves.

Definitely, any graduate can apply for IIM's just perform excellent in CAT.

To get admission in B.Sc, you have to scored atleast 50% Marks in your Intermediate Examination. But if you want to get admission in top colleges, then for this you have to appear for the entrance examination and after clear the entrance examination you will get admission in B.Sc. The admission in this course are also based on Merit Basis according to your 12th Percentage, So if you have scored good marks in your 12th, then you will easily get admission in B.Sc Course. So, to get admission In B.Sc ourse In DU, then for this, you have to scored Miminum 55% marks in PCM subject.

Have a strong technical base in mathematics subjects.

No, you need to do your M.Sc. Also, since its is a 12+4 criteria to oursue M.Tech and apart form this you also need to have that level of string technical base which is not possible to build only through B.Sc.

Yes, you can and you can get an lateral entry in second year.

BCS in biochemistry biomedical botany chemistry.