p -Block elements - ll — Chemistry STD 12 Science — Question

$(i)$ ${C_4}{H_5}N{H_2}$          $(ii)$ $C{H_3}N{H_2}$

$(iii)$ ${(C{H_3})_2}NH$            $ (iv)$ ${(C{H_3})_3}N$

$k =\left(6.5 \times 10^{12} \,s ^{-1}\right) e ^{-26000 K / T }$

is followed for the decomposition of compound $A$. The activation energy for the reaction is $.....\,kJ$ $mol ^{-1}$. [nearest integer]

(Given: $R =8.314 \,J\, K ^{-1}\, mol ^{-1}$ )

Reason : Red phosphorus consists of $P_4$ tetrahedral units linked to one another to form linear chains.