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<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Which pair of elements has maximum electronegativity difference?

AIIMS 2019

A
Na and F
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B
Na and Cl
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C
Na and Br
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D
Li and F
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Solution

The correct option is A Na and F
Among Li and Na; Na is more electropositive.
Among F, Cl and Br; F is most electronegative.
So, Na and F will have the maximum electronegativity difference.
Elements Electronegativity values (Pauling's scale)
F 4
Cl 3
Br 2.8
I 2.5
Li 1
Na 0.9

Hence, option (b) is the correct answer.

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