Genus represents

$A$ ray of light passes through an equilateral prism such that the angle of incidence is equal to the angle of emergence and each one is equal to $3/4$th the angle of the prism. The angle of deviation is (in $^{\circ}$)

$A$ string is stretched between fixed points separated by $75.0 \ cm$. It is observed to have resonant frequencies of $420 \ Hz$ and $315 \ Hz$. There are no other resonant frequencies between these two. Then,the lowest resonant frequency for this string is .... $Hz$.

Chemical leaching is useful in the concentration of:

What are the shapes of ethyne and methane?

In non-cyclic photophosphorylation,the electron $(e^-)$ released by $PSI$ is accepted by.......