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Q.

Identify the pair of elements with the highest and lowest electronegativity respectively

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a

K and Rb

b

F and Fr

c

I and F

d

Fr and Li

answer is C.

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Detailed Solution

Francium (Fr) has the lowest electronegativity whereas fluorine (F) has the highest electronegativity.

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Identify the pair of elements with the highest and lowest electronegativity respectively