Science

If you do your master's in the same field of your
Undergraduate, you can have more scope and job opportunities. Master's in chemistry field will be better,.it will be better to pursue masters in india rather than aboard according to me ( as im pursuing my master's in aboard I know that.)but . go for more reference and take further step in your career.all the best

M.Sc biotechnology, microbiology , food technology etc.,there are so many.but if you do M.Sc biotechnology, you can have more scope and job opportunities. It is according to me. But it will be better if you go for more reference and take further step in your career. All the best

Both has appropriate equal demand.on which subject you grip, you can select that, and if you do Masters on the same subject, you can have more scope and job opportunities. All the best

CA is not actually taught in colleges. you need to clear CPT first by joining some private institutes for enrolling yourself as a CA student.

According to me M.Sc integrated biotechnology can save 1 year of your precious time.bt while coming to the salary of job M.Sc after B.Sc will be better.all the best.

Hey, you can explore B.Sc. colleges in Delhi on below link:
https://engineering.shiksha.com/bsc-colleges-in-delhi-ncr-categorypage-2-64-1-0-0-10223-1-2-0-none-1-0
Colleges listed on this link are some of the very good in the region.
All the best.!!!

B.Tech is better than B.Sc. when job opportunities are factor. After B.Tech. you will have much more job opportunities compared to B.Sc. But if you interested in research then opt for B.Sc. and then go on for higher studies like doing M.Sc. and Ph.D.
All the best.!!!