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F has the highest electronegativity amon...

`F` has the highest electronegativity among the group `17` elements (i.e. `ns^(2) np^(2) np^(5)` type), on the Pailing scale, but the `EA` of `F` is less than that of `Cl` because

A

`F` being the first member of the family behaves in an unusual manner.

B

The atomic number of `F` is less than that of `Cl`.

C

`Cl` can accommodate an electron better than `F` by utilsing its vacant `3d` orbital.

D

Small size, high `EN` and an increased electron-electron replusion makes addition of an electron to `F` less favourable.

Text Solution

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The correct Answer is:
D
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CENGAGE CHEMISTRY-PERIODIC CLASSIFICATION OF ELEMENTS AND GENERAL INORGANIC CHEMISTRY-Ex 1.2(Objective)
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  3. Which is//are ampoteric oxide ?

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  4. EA is positive when

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  5. Which has the maximum covalent character?

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  8. NO(2) and N(2)O(4) are two forms of nitrogen dioxide. One exists in ga...

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  12. Which of the following triads have approximately equal size ?

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  13. Which pair is different from the others ?

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  14. Compound XY is predominantly ionic as X^(o+)Y^(ɵ) if

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  16. Which of the correct order of size ? (O^(ɵ), O^(2-), F^(ɵ) and F ?)

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  18. The correct order of decreasing ionic character is

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  19. The correct order of decreasing polarisability of ion is

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