Hello,

If you have got 100 marks it is expected that your percentile can be near about 95 but it can change after JEE Mains paper 2 but not much change is expected. So, your expected rank can be about 42k in CRL and about 1k-2k in SC cateogry and you to have home state quota.

So, you have good chances to get CSE in NIT Silchar but still I would like to suggest you to focus on JEE Mains next paper to improve your position.