AIPMT MAIN2008Chemistry-Periodic Table
AIPMT MAIN 2008 Chemistry Ionisation Enthalpy MCQ Question
Type: MCQ-conceptual-Medium-Class 11
The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn (25) is
A
Ti > V > Cr > Mn
B
Cr > Mn > V > Ti
C
V > Mn > Cr > Ti
D
Mn > Cr > Ti > V
Correct Answer
Option B
Detailed Explanation
Cr (24) → [Ar] 3d⁵ 4s¹. After removing one electron from chromium, the resulting structure becomes more stable. Hence Cr has higher second ionisation enthalpy.
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