Question 61 of 84
Q.Which of the following molecule does not contain π bond?
(a) CO2
(b) H2O
(c) SO2
(d) NO2
Puducherry TnboardTamil Nadu HSC First Year (DGE) Board 2019MCQ· 1mImportance★★★★★
73% · 61/84 Questions
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Start your 14-day free trial to unlock the full solution →Water (H2O) has only sigma bonds and lone pairs — it contains no π bond, unlike CO2, SO2, and NO2.
A π bond forms only where there is a double or triple bond (multiple bonding), from sideways overlap of unhybridised p-orbitals in addition to the sigma bond.
- CO2: O=C=O has two C=O double bonds, so it contains two π bonds.
- H2O: has two O-H single bonds only (each a sigma bond) plus two lone pairs on the sp3-hybridised oxygen — there is no multiple bond anywhere in the molecule, so it has zero π bonds. …
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