AIIMS2004Chemistry-Electronic Configuration
AIIMS 2004 Chemistry Transition Elements Assertion Reason Question
Type: Assertion Reason-conceptual-Medium-Class 12
Assertion : The free gaseous Cr atom has six unpaired electrons.
Reason : Half-filled s orbital has greater stability.
A
If both assertion and reason are true and reason is the correct explanation of assertion
B
If both assertion and reason are true but reason is not the correct explanation of assertion
C
If assertion is true but reason is false
D
If both assertion and reason are false
Correct Answer
Option C
Detailed Explanation
z1Cr → [Ar] 3d4 4s2, Cr → [Ar] 3d5 4s1, Full-filled s-orbital has greater stability.
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