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Tendency for \large M_{(s)} \rightarrow M^{+3}_{(aq)} + 3e^- is highest for

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By Expert Faculty of Sri Chaitanya
a
Ga
b
In
c
Al
d
Tl

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detailed solution

Correct option is C

For 13Th group elements the highest oxidation state is due to the involvement of valency ns electrons and np electrons  The higher oxidation state stability from top to bottom in a group decreases.Stability of +III oxidation state : Al+3 > Ga+3 > In+3 > Tl+3 Al is more stable in +3 oxidation stateWhere as +1 oxidation state stability from top to bottom increases,due to inert pair effect.Stability of +1 oxidation state : Ga+1 < In+1 < Tl+1


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The bond dissociation energy of BF bond in BF3 is 646 kJ mol–1 whereas that of CF in CF4 is 315 kJ mol–1. The correct reason for higher B-F bond dissociation energy as compared to that of C-F bond is :

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