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JEE Main Chemistry question

ChemistryClassification of Elements and Periodicity in PropertiesJEE Main

The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is

Answer: (D)

Solution

After losing its first (4s) electron, attains the configuration (stable, half-filled); removing a second electron means breaking into this extra-stable half-filled subshell, requiring the largest second ionisation energy among these four. (after losing one 4s electron, config )

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Question ID VK-133450