Marshall's acid `overset(H_(2)O) to A+B`
`Aoverset(H_(2)O)toB+C`
If P and Q represent maximum number of atoms that can lie in a plane of compound A and C respectively. Then, find out value of (P-Q).

Answer

2

Explanation

`underset("Marshall's acid")(H_(2)S_(2)O_(8))+H_(2)O to underset((A))(H_(2)SO_(5))+underset((B))(H_(2)SO_(4))`
`underset((A))(H_(2)SO_(5))+H_(2)O to underset((C))(H_(2)O_(2))+underset((B))(H_(2)SO_(4))`

P=5
Q=3
P-Q=5-3=2