1.
CN−\mathrm{CN^-} is oxidised by NO3−\mathrm{NO_3^-} in presence of acid:
a CN−+b NO3−+c H+→(a+b) NO+a CO2+c2 H2Oa\,\mathrm{CN^-} + b\,\mathrm{NO_3^-} + c\,\mathrm{H^+} \rightarrow (a+b)\,\mathrm{NO} + a\,\mathrm{CO_2} + \frac{c}{2}\,\mathrm{H_2O}

What are the whole number values of aa, bb, cc in that order?