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Question

Small Quantities of solutions of compounds TX, TY and TZ are put into separate test tubes containing X,Y and Z solutions. TX does not react with any of these. TY reacts with both X and Z. TZ reacts with X. The decreasing order of oxidation of anions X−,Y−,Z− is :

A
Y,Z,X
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B
Z,X,Y
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C
Y,X,Z
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D
X,Z,Y
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Solution

The correct option is A Y,Z,X
TX does not react with any solution. This means that X is easily oxidized. TY reacts with X and Z. This means Y is oxidized by both.
(Y+XY+X);
(Y+ZY+Z)
TZ reacts with X only. This means Z is less easily oxidized than Y. Thus, decreasing order of oxidation of anions X,Y,Z will be: Y,Z,X

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