$BF_3$ is used as a catalyst in many industrial processes because of its .....

$A$ $2 ~kg$ ball moving at $24 ~ms^{-1}$ undergoes an inelastic head-on collision with a $4 ~kg$ ball moving in the opposite direction at $48 ~ms^{-1}$. If the coefficient of restitution is $2/3$,what are their velocities in $ms^{-1}$ after the impact?

Which of the following represents the correct electronic configuration of a neutral $Carbon$ atom in its ground state?

The angular magnification of a simple microscope can be increased by increasing

Heroin is a derivative of

If the lines $4x + 3y - 1 = 0$,$x - y + 5 = 0$,and $kx + 5y - 3 = 0$ are concurrent,then $k$ is equal to: