JEE Main - Previous Year Papers JEE MAIN 2026 JEE Mains 5 April 2026 Paper Shift -1 Single Correct MCQ
Published on: August 13, 2026

The correct statements about metal carbonyls are

A
The metal-carbon bonds in metals carbonyls possess both and -character.
and , and
B
Due to synergic bonding interactions between metals and CO ligand the metal-carbon bond becomes weak.
only
and
C
The metal-carbon bond is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of metal.
and only
D
The metal-carbon bond is formed by the donation of electrons from filled d-orbital of metal into vacant orbital of CO.
Choose the correct answer from the options given below:
only
only

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Text Solution

Verified by Experts
The correct answer is:
B

The metal-carbon bonds in metal carbonyls possess both and -character.
The metal to ligand bonding creates a synergic effect which strengthens the bond between CO and the metal i.e. metal carbon bond becomes strong.
The metal-carbon is formed by the donation of lone pair of electrons on the carbonyl carbon into a vacant orbital of metal.
The metal-carbon bond is formed by the donation of electrons from filled d-orbial of metal into vacant orbital of CO.

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