Consider the reactions:
a. `H_(3)PO_(2)(aq)+4AgNO_(3)(aq)+2H_(2)O(l) rarr H_(3)PO_(4)(aq)+4Ag(s)+4HNO_(3)(aq)`
b. `H_(3)PO_(2)(aq)+2CuSO_(4)(aq)+2H_(2)O(l) rarr H_(3)PO_(4)(aq)+2Cu(s)+H_(2)SO_(4)(aq)`
c. `C_(6)H_(5)CHO(l)+2[Ag(NH_(3))_(2)]^(o+)(aq)+3overset(Θ)(OH)(aq) rarr C_(6)H_(5)COO^(Θ)(aq)+2Ag(s)+4NH_(3)(aq)+2H_(2)O(l)`
d. `C_(6)H_(5)CHO(l)+2Cu^(2+)(aq)+5overset(Θ)(O)H(aq) rarr` No change observed
What inference do you draw about the behaviour of `Ag^(o+)` and `Cu^(2+)` from these reaction?

Explanation

(a) Hypophosphours acid `(H_(3)PO_(2))` reduces `Ag^(+)` ions to Ag which gets rpecipitated
(b) Hypophosphorus acid `(h_(3)PO_(2))` reduces `Cu^(2+)` ions to Cu which gets precipated
(c ) Benzaldehyde `(C_(6)H_(5)CHO)` reduces `Ag^(+)` ions to Ag which gets precipatated
(d) Benzaldehyde`(C_(6)H_(5)CHO)` is not in a position to reduce `Cu^(2+)` ions to Cu
This shows that `Ag^(+)` ions are stronger oxidising agent than `Cu^(2+)` ions all the reactions .This is quite evident from ehir relativ epositions inthe rectivity series