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Question

A valid Lewis structure of _____ cannot be drawn without violating the octet rule.

A
ClF3
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B
PCl3
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C
CCl4
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D
None of these
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Solution

The correct option is A ClF3
The Lewis structure of ClF3 is:


Valence electrons in Cl=10

The Lewis structure of PCl3 is:

Valence electrons in P=8


The Lewis structure of CCl4 is:

Valence electrons in C=8

The central atom, chlorine of ClF3 has 10 electrons in its valence shell and forms an expanded octet and hence violates the octet rule. Whereas, all the other three, that is CCl4 and PCl3 have 8 electrons in its valence shell and thus completes its octet.

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