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The p-Block Elements (Group 13 and 14)
Inert Pair Effect – Group 13
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- of The p-Block Elements (Group 13 and 14)
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Concepts tested
- stability of +1 vs +3 oxidation state
All Questions
2023 1 question
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Taking stability as the factor, which one of the following represents correct relationship?
Thallium is more stable in the +1 state because of the inert pair effect.
$Tl^{+3}$ is less stable than $Tl^{+1}$ (inert pair effect). Going down group 13, stability of lower oxidation state increases. In case of B, Al, Ga and In, higher O.S. +3 remains more stable than lower O.S. +1. But in the last element, thallium (Tl), lower O.S. +1 becomes more stable than higher O.S. +3.