Hello aspirant,
You need to pass 12th standard. Make sure that you select Physics, Chemistry and Maths as your core subjects in 11th and 12th. You must secure a minimum of 60% in the same. After 12th standard you need to appear for the IIT-JEE exam. Your admission to the institute will be dependent on the score in the entrance exam and also 12th standard marks.
I hope this helps
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