A valid Lewis structure cannot be drawn for which of the following compounds? (P=15,Si=14,C=6,)
A
PO3−4
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B
SiF4
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C
CF4
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D
CH4
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Solution
The correct option is APO3−4 In a valid lewis structure, the central atom should have a complete octet i.e., follow the octet rule.
(a) Central atom, P has 10 valence electrons. (b) Central atom, Si has 8 valence electrons. (c) Central atom, C has 8 valence electrons. (d) Central atom, C has 8 valence electrons.
Hence, PO3−4 violates the octet rule.