Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.
(Given : Energy of the electron in the first shell of the hydrogen atom is $-2.2 \times 10^{-18} \,J$; $h =6.63 \times 10^{-34}\, Js$ and $c =3 \times 10^{8} \,ms ^{-1}$ )
$\left. \begin{gathered}
{\text{4N}}{{\text{H}}_{3(g)}}{\text{ + 5}}{{\text{O}}_{2(g)}} \to {\text{ 4N}}{{\text{O}}_{(g)}}{\text{ + 6}}{{\text{H}}_{\text{2}}}{{\text{O}}_{{\text{(l)}}}} \hfill \\
{\text{2N}}{{\text{O}}_{(g)}}{\text{ + }}{{\text{O}}_{2(g)}} \to {\text{2N}}{{\text{O}}_{2(g)}} \hfill \\
{\text{3N}}{{\text{O}}_{2(g)}}{\text{ + }}{{\text{H}}_{{\text{ 2}}}}{{\text{O}}_{(l)}} \to {\text{2H N}}{{\text{O}}_{3(aq)}}{\text{ + N}}{{\text{O}}_{(g)}} \hfill \\
\end{gathered} \right|\begin{array}{*{20}{c}}
{\Delta H(kJ)} \\
{ - 904} \\
{ - 112} \\
{ - 140}
\end{array}$
