Assertion : The formation of from is exothermic

CHEMISTRY · Subjective · A Level · Chemistry · Periodicity and periodic trends · Periodicity and periodic trends

Problem

Assertion : The formation of F(g)−\text{F}^-_{(\text{g})} from F(g)\text{F}_{(\text{g})} is exothermic, whereas that of O(g)2−\text{O}^{2-}_{(\text{g})} from O(g)\text{O}_{(\text{g})} is endothermic. Reason : The addition of second electron to a monovalent anion is difficult because both have the same charge and experience more repulsion.

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