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Q.

Among the following, redox reaction is

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a

${CaC}_{2} O_{4} + 2 HC l \to CaC l_{2} + {/H}_{2} C_{2} O_{4}$

b

${NaCl + KNO}_{3} \to {NaNO}_{3} + KC l$

c

$Zn+2AgCN \to {2Ag + Zn(CN)}_{2}$

d

${Mg(OH)}_{2} + 2 {NH}_{4} C l \to MgC l_{2} + 2 {NH}_{4} OH$

answer is D.

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Detailed Solution

Among all the given choices , correct choice is d $Zn+2AgCN \to {2Ag + Zn(CN)}_{2}$ is a

redox reaction. Because all displacement reactions are redox reactions.

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