Study Abroad

As always, US and UK universities gives you much better opportunities than other countries. But, you can also opt for Tokyo University or Nanyang Technological University respectively in Japan and Singapore, as they are also good as well.

It doesn't matter how many marks you have got. However, it depends on your preparation and understanding capabilities for each and every topic. Basically, in most of the cases 65% is the maximum score to apply for M.Sc course in any institute. If you have not applied for JAM yet then you can go through other entrance exams conducted by different universities.
You should try in top central universities like Hyderabad University, BHU, Pondicherry, Delhi University, etc. You can further go for CUCET conducted by 10 central universities.

Score high on the GMAT, scholarships will follow. While applying for a scholarship, make sure you meet all the criteria. You should have an excellent educational record with excellent additional activities. You may be write a scholarship essay and visit the school website and you'll find various offer.

No, you need to clear your backlogs first.

US, German-region, Japan and China are the best choices.
Read More: https://www.quora.com/Which-is-the-best-country-to-study-a-masters-in-chemical-engineering

If you are planning for abroad then you should also apply for GMAT or GRE.