$(1)$ $H\ddot O\, - \,N{O_2}\,\overset {{H_2}S{O_4}} \longleftrightarrow {H_2}\mathop O\limits_ \oplus - N{O_2}$ $\overset {{H_2}S{O_4}} \longleftrightarrow {H_2}O{ - ^ \oplus }N{O_2}$
$(2)$ ${H_2}O\, + \,{H_2}S{O_4}\, \rightleftharpoons \,{H_3}{O^ \oplus }\, + \,HSO_4^\Theta $
net reaction, i.e., $HN{O_3}\, + \,2{H_2}S{O_4}\, \rightleftharpoons $ $^ \oplus N{O_2}\, + {H_3}{O^ \oplus } + \,2HSO_4^\Theta $
$C{H_3}C \equiv \,CC{H_3}\,\xrightarrow[{{\text{heat}}}]{{NaN{H_2}/{\text{inert solvent}}}}P$