how many marks in jee mains can we score by preparing only nta abhyas questions

Dear Aspirant,

Those questions are just for practice. The real paper will not be the same. It's to give you an idea about what kind of questions are present in the paper. You can score better if you solve past year papers. The motive is to practice. Solve as many questions as you can through various sources and not just one. Because it's a competitive exam. Students work so hard to crack it. You need to go above and beyond to make your mark.

Hope this Helps!
All the Best