Dear Hafiz,
First of all if you attempted only few marks and all answers are correct, you'll be awarded marks completely (if you hadn't jump any step). After that we need to consider some criteria to find the possibilities of providing the grace marks.

If the questions were difficult and majority fails in the subject, there is a provision in CBSE to provide grace mark but in my point of view, paper were not too tough this year.

So, If you have solved some questions upto some extent, you shall get step marks rather than the grace mark but if you didn't attempted other questions, my suggestion is to try hard and score a better marks next year.