Chemistry-Coordination Number
NEET Chemistry Coordination Number Assertion Reason Question
Type: Assertion Reason-assertion-Hard-Class 12
Assertion (A): The geometry of the complex ion [MnBr4]2– is tetrahedral. | Reason (R): The magnetic moment of the complex ion is 5.9 BM, indicating the presence of five unpaired electrons.
A
Both A and R are true, and R is the correct explanation of A.
B
Both A and R are true, but R is not the correct explanation of A.
C
A is true, but R is false.
D
A is false.
Correct Answer
Option A
Detailed Explanation
The coordination number of Mn2+ in [MnBr4]2– is 4, which can be tetrahedral (sp3) or square planar (dsp2). The magnetic moment of 5.9 BM confirms five unpaired electrons, consistent with a tetrahedral geometry.
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