Hey, as per your query I would like to inform you that yes you can get a college with 340 marks. The minimum required is 300 till last year so if we go according to that then yess you will get a seat in government college. If you want to know which college is the best according to your marks I'll recommend you college predictor it'll help you with that.

https://medicine.careers360.com/neet-college-predictor?icn=QnA&ici=qna_answer

Thankyou.