i have paased my 12th with physics, chemistry and maths with 50% and above will i get admission in BMS College of Engineering based on board marks

Yes, you can! According to the criteria prescribed by BMS College of Engineering, Bengaluru, students who have passed class 12th with English along with minimum 45% of Marks in related subjects (based on the course you want to apply to) is eligible to pursue in UG programs