AP BIOLOGY

BIOCHEMISTRY

POLAR AND NONPOLAR MOLECULES

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What kind of bond do you have:F and Cl
A
Non-polar covalent
B
Polar covalent
C
ionic
D
James Bond
Explanation: 

Detailed explanation-1: -FCl is a polar molecule. Fluorine (F) is more electronegative than chlorine (Cl).

Detailed explanation-2: -It consists of two similar fluorine atoms; so electrons from one fluorine atom will not be pulled by other fluorine atom. This molecule shows equal sharing of electrons between fluorine atoms. Therefore, the given molecule is considered as a non polar covalent bond.

Detailed explanation-3: -∙ Fluorine is the most electronegative element. Hence, maximum electronegativity difference is seen in carbon and fluorine (C-F). Thus, the C-F bond has the most polar character.

Detailed explanation-4: -If we look at the bonds individually, Carbon has an electronegativity of 2.5 and fluorine has an electronegativity of 4.0. The difference of 1.5 says that each C-F bond is very polar, but when put into the structure the symmetry cancels this polarity out and the overall structure is nonpolar.

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