Science

You can change your stream after you PUC, and as you have studied Science, you can change your stream to any possibly available stream by just pursuing any of the course of that field.

Yes you can change your stream by opting any of the commerce graduation courses and it doesn't affect your career in any way.

Well, it doesn't really depend on the percentage to decide what course is to be chosen after SSLC. But, for an idea 70% above is recommended.

Yes, you can get IIT, Delhi if you have a good rank.

You can go for a graduation course, but it is highly unlikely with your scored percentage to get into any good stream with a good honors subject. Definitely, you cannot appear for any entrance based competitive exam cause in them the minimum eligibility percentage is 50. So, try to get into a decent

Hello,
Both are different field, if you want to make your career in civil social services, then go for an IAS. If you want to see your career in civil engineering, then go for higher education. You can give IES exam also, if you are having interest.

Yes, you can, as the minimum eligibility for M.Sc chemistry in Chandigarh University is that a student should have a minimum of 55 percentage in his graduation.
https://www.shiksha.com/science/course/m-sc-in-chemistry-cu-chandigarh-university-279034

Chandel Institute of Management and Technology offers Diploma in Engineering, which is a UG Diploma degree course. The colleges offers the course via distance/correspondence mode for a duration of 3 years. The total fees for the course is INR 69,000 and the medium of the course is English.
The eligib

Please click the link below:
https://www.shiksha.com/exams/ntse/results.