........................A.......................................................

ID: 869951 • Letter: #

Question

........................A.......................................................... B

Consider the Lewis Structures for HFCO, which of the following statements is correct?

A. Structure B is incorrect because the double bond should be between the fluorine and carbon atoms rather than the oxygen and carbon atoms

B. Structure A is incorrect because a lone pair on oxygen should be shifted to make a double bond between the oxygen and carbon atoms.

C. Structures A and B are equally correct resonance structures

D. Structure B is incorrect because the double bond creates a formal charge on the carbon and oxygen atoms

E. Structure A is incorrect because it does not account for all the valence electrons

A) the statement is wrong

Fluorine has 7 valence electrons

so it required 1 more electron to complete octet rule

so it forms a single bond with carbon

as its octet is complete it will not form more bonds

so the statement is wrong

oxygen has six valence electrons

so it requires two more electrons to complete the octet

so it forms a double bond with carbon and completes the octet

so the second statement is true

C) Structures A and B are not equally resonance structures

so this statement is wrong

D) this statement is wrong and Struture B is correct

E) the carbon in structure A does not complete its octet rules

so this statement is wrong

SO the correct statement is B

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