The relation between $(A)$ and $(B)$ is:

Nitrobenzene on reduction with zinc and $NH_4Cl$ gives

The magnitude of maximum acceleration is $\pi$ times that of maximum velocity of a simple harmonic oscillator. The time period of the oscillator in seconds is

Young's double-slit experiment is carried out by using green,red,and blue light,one color at a time. The fringe widths recorded are $\beta_G, \beta_R$,and $\beta_B$ respectively. Then:

$A$ compound of mercury used in cosmetics,in Ayurvedic and Yunani medicines and known as Vermilion is

The current $i$ in the circuit will be: