Science

https://www.shiksha.com/university/ccs-chaudhary-charan-singh-university-Meerut-19694/courses/bsc-bc
Open this link and you will get your answer.

Yes, definitely. You can apply with this score anywhere including private institutes and about getting admission in a government organization, it depend on merit but if we talk about the private institutes you will definitely get the same.

Hi,
Yes, you can apply for M.Sc Entrance exam in Biotechnology. Thanks.

If you are good in your concept which you will learned in your B.Sc, then you can get high package irrespective of branch. But you can take Finance, CSE, and mathematics etc. These are highly demanding.

Hi there, you can go for the below professions suggested
Accountancy & Professional Service
The Actuarial Profession
Banking - Investment Banking
Banking - Retail Banking
Computing & IT
Engineering Sciences
General Management
Operational research.
Hope this helps.

MCA management has better scope between the both mentioned courses.
You can refer the below mentioned link:
http://www.indiaclass.com/mca-management-mca-science-best/
Hope this helps you.

Addmision of Banaras Hindu University Varanasi will be started from mid of June you can apply for this, and good luck from my side.

As you pursued B.Tech in Chemical Science. My advice is to choose M.Sc. To become a lecturer of Chemical Sciences. Once you complete the postgraduation in Chemical Sciences, you can apply for CSIR NET Exam. The Council of Scientific and Industrial Research conducts the CSIR NET Exam through which candidates are selected for the post of Assistant Professor. Candidates are also awarded with Junior Research Fellowship through this exam.

BBA in Finance is the Basic foundation subject that you'll study in your MBA, but in B.Sc, you'll learn about science subjects. Whereas, in BBA you'll not study science subjects that's the only difference. Both can land you up in doing MBA.