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Q.

Among the following pairs of ions, the lower oxidation state in aqueous solution is more stable than the other in

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a

Tl+,Tl3+

b

Cu+,Cu2+

c

Cr2+,Cr3+

d

V+,VO2+

answer is A.

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Detailed Solution

Tl+ ions are more stable than Tl3+ and thus, Tl3+ ions change to Tl+ ions thereby acting as oxidising agents. Tl3+ compounds +2e→Tl+ compounds(less stable oxidising agent) (more stable oxidising agent)
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