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Which statement explains why a C–O bond is

more polar than a F–O bond?

(1) At STP, carbon has a greater density than

fluorine.

(2) A carbon atom has more valence electrons

than a fluorine atom.

(3) The difference in electronegativity between

carbon and oxygen is greater than that

between fluorine and oxygen.

(4) The difference in first ionization energy

between carbon and oxygen is greater than

that between fluorine and oxygen.

Verified Answer :

taskmasters

The correct answer is statement 3, the difference in electronegativity between carbon and oxygen is greater than that between fluorine and oxygen. The most polar bond is the one with the highest difference in electronegativity values between two atoms. In this case, the C-O bond.

Answer: (3) The difference in electronegativity between  carbon and oxygen is greater than that  between fluorine and oxygen.

Explanation: Polarity of a molecule is due to the difference in electronegativity of the atoms. More is the electronegativity difference, more is the polarity.

Electronegativity of carbon = 2.5

Electronegativity of oxygen = 3.5

Electronegativity of fluorine = 4.0

Thus the difference in electronegativity of carbon and oxygen is=(3.5-2.5)= 1.0

Thus the difference in electronegativity of fluorine and oxygen is=(4.0-3.5)= 0.5.

Thus C-O bond is more polar than F-O bond.

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