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B
+1
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C
+2
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D
−1
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Solution
The correct option is C+2 Since,Na2[Ag(S2O3)2]isacomplexcompound.So,Itwillbeelectrcityneutral.So,byputtingtheoxidationstateofeachand,lettheoxidationstateAgisX.Now,2(+1)+(X)+2(−2)=02+X+(−4)=0∴X=+2Hence,theoptionCisthecorrectanswer.