The transition metal having highest 3rd ionisation enthalpy is : (A) Cr (B) Mn (C) V (D) Fe — JEE Mains Chemistry Past Papers Chemistry Question
Question
The transition metal having highest 3rd ionisation enthalpy is : (A) Cr (B) Mn (C) V (D) Fe
Answer: B
💡 Solution & Explanation
3rd Ionisation energy : [NCERT Data] V : 2833 KJ/mol Cr : 2990 KJ/mol Mn : 3260 KJ/mol Fe : 2962 KJ/mol alternative Mn : 3d5 4s2 Fe : 3d6 4s2 Cr : 3d5 4s1 V : 3d3 4s2 So Mn has highest 3rd IE among all the given elements due to d5 configuration.
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