Being an applied scientist in India is a very wise profession. To do a job that a scientist genuinely covers, you need to have proper dedication, immense interest in your work and a good grip in research. For being a scientist you need to posses the basic degrees like :

10+2 with a good %

Pursuing courses like B.Sc / B.E / B.Tech , for that you can sit for different entrance exams

Followed by M.Sc/ M.Tech

And PhD completed successfully, if you crack exams like GATE , you can avail a good fellowship for your higher studies.