BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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less than .5
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between .5 and 2.1
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greater than 2.1
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Detailed explanation-1: -A bond in which the electronegativity difference between the atoms is between 0.5 and 2.0 is called a polar covalent bond. A polar covalent bond is a covalent bond in which the atoms have an unequal attraction for electrons and so the sharing is unequal.
Detailed explanation-2: -A bond in which the electronegativity difference between the atoms is between 0.5 and 2.1 is called a polar covalent bond.
Detailed explanation-3: -When it is large, the bond is polar covalent or ionic. The absolute values of the electronegativity differences between the atoms in the bonds H–H, H–Cl, and Na–Cl are 0 (nonpolar), 0.9 (polar covalent), and 2.1 (ionic), respectively.
Detailed explanation-4: -In general the electronegativity difference must be 0.5 or more before the bond is labeled as a polar covalent bond instead of nonpolar covalent bond. The relationship between electronegativity difference (