Question
Balance the given skeletion equation 
by partial equation method.
Solution
It involves the following steps:
(i) Nitric acid decomposes to liberate nascent oxygen.
...(1)
(ii) Nascent oxygen reacts with phosphorus to form phosphorus pentoxide.
...(2)
(iii) 
dissolves in water to form phosphoric acid.
...(3)
Balancing the partial equations by hit and trial methods,
...(5)
...
(6)
Multiplying the partial equations (4) and (6) by 10 and 2 respectively and adding all the three equations, we have,
