Extraction of zinc from zinc blende is achieved by

The major product of the following reaction is

Secondary sewage treatment is mainly a

The use of anti-histamine,adrenaline,and steroids quickly reduces the symptoms of:

In thermodynamics,which one of the following properties is not an intensive property?

$A$ proton, a deuteron, and an $\alpha$-particle having the same momentum enter a region of uniform electric field between the parallel plates of a capacitor. The electric field is perpendicular to the initial path of the particles. Then the ratio of deflections suffered by them is