1.

An example of reversible reaction is

Answer»

`PB(NO_3)_2(AQ)+2NAL(aq) hArr PbI_2(s) +2NaNO_3(aq)`
`AgNO_3(aq)+NaCI(aq)hArr AgCI(s) +NaNO_3(aq)`
`2NA(s) +2H_2O(I) hArr 2NaOH(aq)+H_2(g)`
`KNO_3(aq)+NaCI(aq)hArr KCI(aq)+NaNO_3(aq)`

Answer :D


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