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Question

Tl+H2O+O2A. A is


A

Tl2O3

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B
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C

Tl(OH)3

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D
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Solution

The correct option is B

Due to inert pair effect Tl shows +1 oxidation state. Therefore TlOH is formed. The valence "s” electrons act as inner core electrons due to poor shielding of "d” and "f” electrons is called as inert pair effect.


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