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Question

Which of the following is the correct order of electronegativity?


A

N>P>As

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B

S>O>Se

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C

F>Cl>Br>I

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D

Both (A) and (C)

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Solution

The correct option is D

Both (A) and (C)


Explanation for correct option:

D. Both (A) and (C)

Electronegativity:

  • “A qualitative measure of the ability of an atom in a chemical compound to attract shared electrons to itself is called electronegativity.”
  • “The electronegativity of any given element is not constant; it varies depending on the element to which it is bound.”

The trend for electronegativity:

  • “Electronegativity generally increases across a period from left to right (say from lithium to fluorine) and decreases down a group (say from fluorine to astatine) in the periodic table.”
  • On the same account electronegativity values decrease with the increase in atomic radii down a group.

For Group-15, the trend of electronegativity is as follows:

N>P>As

For Group-17, the trend of electronegativity is as follows:

F>Cl>Br>I

Expalantion for incorrect options:

B. S>O>Se

The given trend for electronegativity is wrong as the electronegativity decreases down the group.

Hence, the correct option is D i.e. Both (A) and (C).


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