Chemistry: The Molecular Nature of Matter and Change 7th Edition

Published by McGraw-Hill Education
ISBN 10: 007351117X
ISBN 13: 978-0-07351-117-7

Chapter 11 - Problems: 11.20

Answer

See explanation below.

Work Step by Step

1 (a) Two sigma bonds comprise a double bond Ans : False Correct Statement : A double bond comprises of exactly 1 sigma and 1 pi bond. 2 (b) A triple bond consists of one pi bond and two sigma bonds. Ans : False Correct Statement : A triple bond comprises of one sigma bond and two pi bonds. 3 (c) Bonds formed from atomic s orbitals are always sigma bonds. Ans : True Reason : As s orbitals have a spherical shape, only sigma bonds are possible from bonds formed by s orbitals. 4 (d) A pi bond restricts rotation about the sigma bond axis. Ans : True Correct Statement : Pi bonds are fixed due to bond overlapping. Thus, rotation along sigma bond axis gets restricted. 5 (e) A pi bond consists of two pairs of electrons. Ans : False Correct Statement : A pi bond consists of a second pair of electrons after a sigma bond has been previously formed. 6 (f) End-to-end overlap results in a bond with electron density above and below the bond axis. Ans : False Correct Statement : End-to-end overlap results in a bond with electron density along the bond axis
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