Chemical Bonding - Result Question 29

####4. The nodal plane in the $\pi$-bond of ethene is located in

(a) the molecular plane

(2002, 3M)

(b) a plane parallel to the molecular plane

(c) a plane perpendicular to the molecular plane which bisects the carbon-carbon $\sigma$-bond at right angle

(d) a plane perpendicular to the molecular plane which contains the carbon-carbon $\sigma$-bond

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Answer:

Correct Answer: 4. (a)

Solution:

Pi bond is formed by the $p$-orbitals whose lobes have minima in the plane of molecule, hence molecular plane is the nodal plane of pi-bond.



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