The central carbon atom of a free radical contains

The decreasing order of stability of the given carbocations is

In the potential energy diagram shown,the point $X$ represents:

Arrange the following free radicals in the correct order of their stability:
$(i)$ $CH_2=\dot{C}H$
$(ii)$ $\dot{C}H_3$
$(iii)$ $CH_3-\dot{C}H-CH_3$
$(iv)$ $(CH_3)_3\dot{C}$

Number of carbocations from the following that are not stabilized by hyperconjugation is $...........$ .

Match the intermediates given in Column $-I$ with their probable structure in Column $-II$.

Column $-I$	Column $-II$
$A$. Free radical	$1$. Trigonal planar
$B$. Carbocation	$2$. Pyramidal
$C$. Carbanion	$3$. Linear