AIPMT PRELIMS2008Chemistry-Inorganic Chemistry
AIPMT PRELIMS 2008 Chemistry Coordination Compounds MCQ Question
Type: MCQ-conceptual-Medium-Class 11
Which of the following complexes exhibits the highest paramagnetic behaviour ?
(1) [Co(OX)₂ (OH₂)]⁻
(2) [Ti (NH₃)₆]³⁺
(3) [V(gly)₂ (OH₂)(NH₃)₂]⁺
(4) [Fe (en) (bpy) (NH₃)₂]²⁺
Where gly = glycinate, en = ethylenediamine and bpy = bipyridyl moieties (Atomic number Ti = 22, V = 23, Fe = 26, Co = 27)
A
[Co(OX)₂ (OH₂)]⁻
B
[Ti (NH₃)₆]³⁺
C
[V(gly)₂ (OH₂)(NH₃)₂]⁺
D
[Fe (en) (bpy) (NH₃)₂]²⁺
Correct Answer
Option A
Detailed Explanation
Paramagnetic behavior is due to unpaired electrons. The complex [Co(OX)₂ (OH₂)]⁻ has the highest number of unpaired electrons, making it the most paramagnetic.
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