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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

The atomic number of elements , , and are , , , and , respectively. If '' is a noble gas, choose the correct answer from the following statements. I. '' has higher electron affinity II. '' exists in +2 oxidation state III. '' is an alkaline earth metal [BITSAT 2008]

Answer: (C)

Solution

With B (atomic number Z) a noble gas, A (Z−1) is the preceding halogen, which indeed has a high electron affinity (statement I true); C (Z+1) is the following alkali metal, which

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Question ID VK-133121