Question:
Statement-I: CO reduces Al$_2$O$_3$ to Al.
Statement-II: CO is a neutral ligand with one $\sigma$ and two $\pi$ bonds.
Statement-I: CO reduces Al$_2$O$_3$ to Al.
Statement-II: CO is a neutral ligand with one $\sigma$ and two $\pi$ bonds.
Statement-II: CO is a neutral ligand with one $\sigma$ and two $\pi$ bonds.
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CO shows strong $\pi$ back bonding with metals.
Updated On: Jun 17, 2026
- Both correct
- I correct, II incorrect
- I incorrect, II correct
- Both incorrect
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: CO cannot reduce Al$_2$O$_3$ to Al because Al$_2$O$_3$ is highly stable and requires electrolysis for reduction. Hence Statement I is incorrect.
Step 2: CO is a strong field ligand and neutral ligand. It forms one sigma bond via carbon and back-donation $\pi$ bonds.
Step 3: It is correctly described as having one $\sigma$ and two $\pi$ interactions. Hence Statement II is correct.
Step 4: Therefore correct answer is (C).
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