Arrange the following as per the instruction given in the brackets:
$F, C l, B r$ (Increasing electronegativity).

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Solution

The increasing order of electronegativity is $B r < C l < F$ .
In a group, on moving from top to bottom, with increase in atomic number, the electronegativity decreases. The electronegativities of F, Cl and Br are 4.0, 3.0 and 2.8 respectively.

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