Question

An example of a reversible reaction is
A. `Pb(NO_(3))_(2)(aq)+2Na(aq)=PnI_(2)(s)+2NaNO_(3)(aq)`
B. `AgNO_(3)(aq)+HCl(aq)=Ag(Cl(s0+NaNO_(3)(aq)`
C. `2Na(s)+H_(2)O(1)=2NaOH(aq)+H_(2)(g)`
D. `KNO_(3)+(aq)+NaCl(aq)=KCl(aq)+NaNO_(3)(aq)`

Answer 1

Correct Answer - D
As all the reactants and products are present in aqueous from in (d) so it is reversible reaction. In other either solid or gas is generated which is insoluble or valatile and hance makes the reaction unidirectional.