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An example of a reversible reaction is (a) Pb(NO3)2(aq) + 2NaI(aq ) = PbI2(s ) + 2NaNO3(aq)

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An example of a reversible reaction is  

(a) Pb(NO3)2(aq) + 2NaI(aq ) = PbI2(s ) + 2NaNO3(aq)

(b)AgNO3(aq) + HCI(aq) = AgCl(s)+ HNO3(aq) 

(c) 2Na (s) + H2O(l) = 2NaOH(aq) + H2(g) 

(d) KNO3(aq ) + NaCl(aq) = KCl(aq) + NaNO3(aq)

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Best answer

The correct option (d) KNO3(aq ) + NaCl(aq) = KCl(aq) + NaNO3(aq)

Explanation:

The reaction, 

KNO3(aq) + NaCl(aq) = KCI(aq) + NaNO3(ag) is an ion exchange reaction. Hence, it is a reversible reaction.

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