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Question

Considering xaxis as the internuclear axis, the overlap of which of the following orbitals will not form a sigma bond and why?
(a) 1s and 2s
(b) 1s and 2px
(c) 2py and 2py
(d) 1s and 2s

Solution
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The combination c will not result in the formation of sigma bond as it will result in sideways overlap.
This will result in the formation of π bond. In the options a,b and d, sigma bond will be formed.

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Q1
Considering xaxis as the internuclear axis, the overlap of which of the following orbitals will not form a sigma bond and why?
(a) 1s and 2s
(b) 1s and 2px
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(d) 1s and 2s
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