My score in BIT SAT - 245, any chance to get allotment in BIT sat goa

You have less chances but dont loose the hope . According to previous years cutoffs it seems that ,you have some chances for chemical branch at goa campus and chemical / civil branch at Hyderabad campus if you want to take Hyderabad also as an option. You should give a try in the councelling may be cutoff decreases this year .You can also see cutoffs here:
https://engineering.careers360.com/articles/bitsat-cutoff