`Na_(2)SO_(3)` and `Na_(2)S_(2)O_(3)`cannot be distingusihed by:

Options

A. addition of `Pb(OAc)_(2)` followed by heating
B. addition `CaCI_(2)` solution
C. addition of `AgNO_(3)` followed by heating
D. all of the above

Answer

C

Explanation

`Na_(2)SO_(3) overset(AgNO_(3))rarr underset(("White"))(Ag_(2)SO_(3))darr overset(Delta)rarr underset(("Black"))(Ag)darr`,
`underset(("White"))(Ag_(2)S_(2)O_(3))darr overset(Delta)rarr underset(("Black"))(Ag_(2)S)darr`