IIT

Hello Vijay, it is very nice to hear from you that you are from sc category and desires to get admission in one of the top IIT. To know the ranking after which admissions me stop I would like to advice you to download college predictors for JEE Advanced available on the net. These can perhaps give you an idea to know about ranking at witch you can get admission in different IIT's in different branches. Best wishes to you.

Depends on branch and category. It is better if you have score above 700 to get good colleges.

A candidate can give JEE Main exam six times over a period of three consecutive years. In a year, a candidate can appear for JEE Main twice in the months of January and April. If the candidate is appearing for the class 12th board exam in 2020, then he/she can appear in both the sessions of JEE Main in years 2020, 2021 and 2022. Also please go through JEE Eligibility criteria for more details.

Hello Shreya Bajaj, oh no. It's not mandatory to appear for JEE Mains to get admission in engineering branch of aeronautical engineering. JEE Mains is required to be given if you are seeking admission in either NIT or IIT or CFTI. For getting admission in college in your state having this branch then you need to give entrance exam assigned by your state. Of course in a private engineering college, you can seek admission against management quota without giving any entrance exam. Best wishes to you.