I have passed my 12th from Nios with 6 subjects and have one compartment in additional subject. Will I be considered eliglible or disquilified if got selected.Or would be given chance to qualify the compartment if I have a good score in slat exam ?

Hello student you need to pass only in 5 subjects if you're pass in 3 core subjects, one language subjects and one additional subjects then you're eligible you need not to appear in compartment examination.
Eligibility - candidates must passed or appearing class 12 in any stream with minimum 45 percent marks aggregate from a recognized board.

For more updates refer to the link mentioned below
https://www.google.com/amp/s/law.careers360.com/articles/slat-eligibility-criteria

Feel free to comment if you have any doubt
Good luck