Hey,

There can be two answers for this question depending upon the Scenario.

Yes, students passed from NIOS are eligible for 85% state quota but there is a condition. You also need to satisfy other condition like minimum tenure of residence in state, property in the respective state and many more depending on the state guidelines.

So check all other requirements of the respective state also. If you want me to help you with any specific state do let me know in teh comment section.

Hope that helps.

Thank you