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Question

Assuming the bond direction to be Z-axis, which of the overlapping of atomic orbitals of two atoms A and B will be result in bonding; (I) s orbital of A and px orbital of B, (II) s orbital of A and pz orbital of B (III) py orbital of A and pz orbital of B, (IV) s- orbitals of A and B


A
I
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B
II
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C
III
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D
IV
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Solution

The correct option is D II & IV


For sigma bond formation the orbitals must lie along the internuclear axis. Here, Z is the internuclear axis, and hence among the p orbitals only pz orbital is capable of forming bond with s orbital.

A sigma bond (σ ) forms when two atomic orbitals overlap between the nuclei of two atoms (also known as the internuclear axis ).


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