BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Both substances are polar. Like polarities repel.
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Both substances are nonpolar. Like polarities repel.
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Water is nonpolar, and oil is polar, so they will not combine.
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Water is polar, and oil is nonpolar, so they will not combine.
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Detailed explanation-1: -Oils, by contrast, are nonpolar, and as a result they’re not attracted to the polarity of water molecules. In fact, oils are hydrophobic, or “water fearing.” Instead of being attracted to water molecules, oil molecules are repelled by them.
Detailed explanation-2: -The structure of an oil molecule is non polar. Its charge is evenly balanced rather than having one positive and one negative end. This means oil molecules are more attracted to other oil molecules than water molecules, and water molecules are more attracted to each other than oil, so the two never mix.
Detailed explanation-3: -Water molecules are polar and one end has a slight negative charge, the other a slight positive charge. Those charges let the molecules form hydrogen bonds and attach to other molecules that are polar, including other water molecules. Oil molecules, however, are non-polar, and they can’t form hydrogen bonds.
Detailed explanation-4: -Nonpolar molecules, like fats and oils, don’t interact with water or form hydration shells. These molecules don’t have regions of partial positive or partial negative charge, so they aren’t electrostatically attracted to water molecules.
Detailed explanation-5: -In order for a molecule to dissolve in water, it has to have either a positive or a negative charge; and that’s where the soap molecule is different from other fats. While most fat molecules have no charge at all, the soap molecules are negatively charged on one end.