The largest group of insecticides produced by plants is .......

$A$ photon of energy $E$ ejects a photoelectron from a metal surface whose work function is $W_0.$ If this electron enters into a uniform magnetic field of induction $B$ in a direction perpendicular to the field and describes a circular path of radius $r,$ then the radius $r$ is given by (in the usual notation):

The acceptable level of carbon monoxide gas $(CO)$ in the atmosphere in $ppm$ level is

The maximum value of $\sin (\cos (\tan x))$ is

For a binomial variate $X$,if $n=4$ and $P(X=4)=6 P(X=2)$,then the value of $p$ is

The general solution of $\sin x - \cos x = \sqrt{2}$,for any integer $n$ is