As per 2019 qualifying cutoff General category, you should have 40% of 200 marks. You will have to score 40 marks in each- MAT and SAT and overall 80 to qualify. Your score is good enough to qualify, But the selection for the second round depends on Chhatisgarh cutoff. You can check the previous year cutoff with the given below link.

https://school.careers360.com/articles/ntse-chhattisgarh-cutoff

Good Luck!

Last yearcutoff hasbeen 117marks under General category and for all other reserved category it hasbeen lower to 117 marks. Hence at themax 137 can be cutoffconsidering shoot of 20marks though very less chances.

Which means 140 as score looks good enough for conversion to NTSE stage2 Chhattisgarh.

https://school.careers360.com/articles/ntse-chhattisgarh-cutoff