If $Alpha$,$Beta$,and $\Gamma$ rays carry the same momentum,which has the longest wavelength?

The compound in which the number of $d\pi - p\pi$ bonds are equal to those present in $ClO_4^{-}$ is:

$A$ body is projected at an angle $\theta$ so that its range is maximum. If $T$ is the time of flight,then the value of maximum range is (acceleration due to gravity $= g$)

$A$ body is projected vertically upwards with a velocity $u$ from the top of a tower. The time taken by it to reach the ground is $n$ times the time taken by it to reach the highest point in its path. The height of the tower is:

$A$ bryophyte,which harbours a nitrogen-fixing blue-green alga in its thallus,is

Which of the following reagents are required to prepare $3$-ethylpentan-$3$-ol?