IIT

Hello Manash,
For doing ME or M.Tech, you need to have done graduation in engineering. You have not done this, hence I am afraid you are not eligible for admission to M.Tech in IIT.

Hi,
Sorry to inform you, but admissions are not possible in IITs without securing a rank in JEE Advanced and JEE Mains for NITs respectively. JEE Mains and Advanced are excepted only in case for foreign nationals/NRIs which need to submit their SAT/GRE score for UG/PG course respectively. Hope this answers your questions.
Thank you.

80% of success in IIT depends upon hard work and only a 10% depends upon the sharpness of mind, rest depends upon your destiny. Work hard for 2 years and you will get where you want and deserve. Never give up if you think that's not what you wanted.

If you are in 11th standard, this is the best time for you to start preparation.
You should take care of these points:
1. Join a coaching if needed.
2. Don't collect to much study material.
3. Find a mentor.
Best of luck.

You can prefer books like RD Sharma for maths and Arihant previous year papers.
Chemistry - error less and NCERT is the best book.
Physics- DC Pandey and join Aakash I-Tutor.
All the best.

Both are the colleges are of national importance and very reputed colleges of India but if any one has to choose among these, give first priority to the IITs.

Yes, you can. The process is same as that of a plus two student. Write the JEE and get a good rank. But it will be very difficult for a student from Diploma to write JEE. The reason is simple, you won't be studying all the subjects which are main for JEE. You will study one particular topic in Diploma, when coming to JEE, the situation is different so there you need all the subjects. And at the same time you will lose one year compared to all the other students because the Diploma course is for three years where as the plus two is two years.