AIIMS2005Chemistry-Coordination Compounds
AIIMS 2005 Chemistry Complex Ions MCQ Question
Type: MCQ-conceptual-Medium-Class 12
An aqueous solution of CoCl₂ on addition of excess of concentrated HCl turns blue due to formation of
A
[Co(H₂O)₄Cl₂]
B
[Co(H₂O)₆Cl₂]²⁻
C
[CoCl₄]²⁻
D
[Co(H₂O)₆Cl₂]
Correct Answer
Option C
Detailed Explanation
CoCl2 is a weak Lewis acid, reacting with chloride ion to produce salt containing the tetrahedral [CoCl4]2− ion.
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