Chemistry
NULL
Medium
Question
Which of the following ion formation is always exothermic ?
A
Uni-negative
✓ Official correct answer
B
Uni-positive
C
Di-negative
D
Di-positive
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A
Uni-negative
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B
Uni-positive
No member explanations yet for this option.
C
Di-negative
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D
Di-positive
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Explanation
Forming a uni-negative ion (adding a single electron) is generally exothermic, unlike ionization processes that remove electrons (endothermic) or add a second electron to an already negative ion (also endothermic, due to electron-electron repulsion).
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