Science

A regular MBA is always preferable for which you will have to clear aptitude tests such as CAT MAT CMAT ATMA-AIMS etc. As applicable to the institute of your study. Specialisations in Telecom Management, Systems and Operations relate to technology as well. But if you do not wish to take a break from routine job chores, then part time or distance education is for you. The choice is yours.

No, physics, chemistry, maths or biology is involved in the exam. You need a good grammar knowledge in English, reasoning ability and should buy a guide for the teaching aptitude. Because to answer the questions of teaching aptitude, you have to think like a teacher and believe me to think like a teacher is not an easy task.

I think, you should have the passion in this field then, you'll be able to get the job and huge packages. Regarding your question biotechnology is a great field.

It depends on your percentage and how you cracked your entrance exam.

Scope depends much on the persons interest and desire to be the best. If you love something, you will naturally grow your knowledge and skill in the field hence forming your so called scope.
So, do what you are passionate about and not worry about what the scope would be.

You can apply for Delhi University,BHU are best colleges in india.

In between the month of July.

If you wish to pursue automobile engineering in India, you will have to take chemistry, however, if you don't take chemistry, there are some countries that allow you to pursue some kinds of engineering. For example, Singapore allows one to pursue engineering without chemistry. Different countries and different institutes have different requirements.