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Which one of the following relation about electronegativity on pauling scale is incorrect ?

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By Expert Faculty of Sri Chaitanya
a
Be = Al
b
Al > Tl
c
B > Ga
d
Tl > In

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detailed solution

Correct option is B

Electronegativity trend (13th group) . . . B > Tl > In > Ga > Al


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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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