I am in general category I got 74% in 12th and 298 marks in neet is there any chance of getting admission in mbbs govt clg ?

Hello,
You have not mentioned your state so it is quite difficult to predict exactly. However, generally, with UR category and 298 marks, your chances of getting a decent government college in your state through state quota(85%) are negligible.
However you might get some good private medical college in your state through state quota.
As the admission to medical colleges based on NEET is given under All India Quota(15%) and state quota(85%).

However cutoffs change every year depending upon level of toughness of exam. So hope for the best and follow the counselling process.

Follow this link to better predict your college-
https://medicine.careers360.com/articles/neet-college-predictor
Good luck