JEE Main 2026 — Coordination Compounds Question with Solution
JEE Main 2026 (05 April Shift 1)
Question
The correct statements about metal carbonyls are
A. The metal-carbon bonds in metal carbonyls possess both and -character.
B. Due to synergic bonding interactions between metal and CO ligand, the metal-carbon bond becomes weak.
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.
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:
A. The metal-carbon bonds in metal carbonyls possess both and -character.
B. Due to synergic bonding interactions between metal and CO ligand, the metal-carbon bond becomes weak.
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.
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:
Choose an option
Show full solutionCorrect option: B
Correct answer
BA, C and D Only
Step-by-step explanation
Statement A is correct. The metal-carbon bond in metal carbonyls possesses both and character due to synergic bonding.
Statement B is incorrect. The synergic bonding interaction between the metal and the CO ligand strengthens the metal-carbon bond.
Statement C is correct. The metal-carbon bond is formed by the donation of a lone pair of electrons from the carbonyl carbon into a vacant orbital of the metal.
Statement D is correct. The metal-carbon bond is formed by the back-donation of electrons from a filled d-orbital of the metal into the vacant antibonding orbital of the CO ligand.
Therefore, statements A, C, and D are correct.
Answer: A, C and D Only
Statement B is incorrect. The synergic bonding interaction between the metal and the CO ligand strengthens the metal-carbon bond.
Statement C is correct. The metal-carbon bond is formed by the donation of a lone pair of electrons from the carbonyl carbon into a vacant orbital of the metal.
Statement D is correct. The metal-carbon bond is formed by the back-donation of electrons from a filled d-orbital of the metal into the vacant antibonding orbital of the CO ligand.
Therefore, statements A, C, and D are correct.
Answer: A, C and D Only
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This is a previous-year question from JEE Main 2026, covering the Coordination Compounds chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.