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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

In how many of the following processes is there a release of energy? (i) (ii) (iii) (iv)

Answer: 1

Solution

(i) Addition of the first electron to a neutral O atom releases energy (exothermic). (ii) Adding a second electron to an already negatively-charged requires energy input (endothermic, due to

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Question ID VK-133876