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Electron gain enthalpies of free anions ...

Electron gain enthalpies of free anions are always

A

zero

B

negative

C

positive

D

nonzero

Text Solution

Verified by Experts

The correct Answer is:
C
Enegry is always required to bring a negative charge (electron) closer to another negative charge (anion). So the addition of a second electron to a `1`-anion to from an ion with a `2-`charge is always endothermic.
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R SHARMA-CLASSIFICATION OF ELEMENTS AND PERIODICITY IN ELEMENTS-Follow-up Test
  1. Which of the following elements have the most negative electron gain e...

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  2. The general horizontal trend is that electron gain enthalpies become m...

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  3. Electron gain enthalpies of free anions are always

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  4. Which of the following elements has the most negative electron gain en...

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  5. Which of these elements has a less favorable (more positive) Delta(eg)...

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  6. Which of the noble gases has the maximum positive Delta(eg)H?

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  7. Which of the halogens has the largest negative Delta(eg)H?

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  8. Which of the group 16 elements has the least negative Delta(eg)H?

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  9. Which of the following elements has positive Delta(eg)H? (i) Mn (ii)...

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  10. Which of the following elements has negative Delta(eg)H?

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  11. Which of the following numerical scales of electrongativity (EN) uses ...

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  12. Linus Pauling, an American scientist, assigned arbitrarily a value oft...

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  13. Which of the following elements is the least electronegative?

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  14. Which of the following elements do not follow the general trends? (i...

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  15. A1through the electronegativity scale is somewhat arbitrary we can use...

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  16. Which of the following compounds contains ionic bonds?

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  17. Which of the following is the most metallic element in the periodic ta...

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  18. Which of the elements exhibit only one valency in the combined state?

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  19. For p-block elements, the normal valence (or group valence is equal to...

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  20. The oxidation number of oxygen in H(2)O(2)is

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