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Which of the following is a feasible reaction?

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{Ba}_{(s)} {+ K}_{2} {SO}_{4}_{(aq)} \to {BaSO}_{4}_{(aq)} {+ 2 K}_{(s)}

{Zn}_{(s)} {+ 2AgNO}_{3 (aq)} \to {Zn(NO}_{3})_{2 (aq)} {+ 2Ag}_{(s)}

{Mg}_{(}_{s)} {+ Na}_{2} {SO}_{4 (aq)} \to {MgSO}_{4 (aq)} {+ 2 Na}_{(s)}

{Cu}_{(s)} {+ MgSO}_{4 (aq)} \to {CuSO}_{4 (aq)} {+ Mg}_{(s)}

answer is B.

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Detailed Solution

${Zn}_{(s)} {+ 2AgNO}_{3 (aq)} \to {Zn(NO}_{3})_{2 (aq)} {+ 2Ag}_{(s)}$

is feasible due to the reactivity of $A g < Z n$ .

remaining cases $C u < M g$ and $M g < N a, B a < K$ .

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