Define impulse of force. Time derivative of momentum gives which physical quantity?

(N/A) $1$. Impulse of force $(J)$ is defined as the product of the average force $(F_{avg})$ and the time interval $(\Delta t)$ during which it acts. Mathematically,$J = F_{avg} \times \Delta t$. It is a vector quantity and its $SI$ unit is $N \cdot s$ or $kg \cdot m/s$.
$2$. According to Newton's Second Law of Motion,the rate of change of momentum (time derivative of momentum) is equal to the net external force acting on the body. Mathematically,$F = dp/dt$. Therefore,the time derivative of momentum gives the physical quantity 'Force'.