BIOCHEMISTRY
POLAR AND NONPOLAR MOLECULES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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ionic compounds
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polar molecules
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nonpolar molecules
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metallic compounds
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Detailed explanation-1: -Polar molecules attract water molecules, mainly through hydrogen bonding. They compete successfully with hydrogen bonds between the water molecules, so they are readily soluble in water.
Detailed explanation-2: -Substances composed of small polar molecules, such as acetone and ethanol, are usually soluble in water. (They are also often soluble in hexane.)
Detailed explanation-3: -Water is a Polar Covalent Molecule Water (H2O), like hydrogen fluoride (HF), is a polar covalent molecule.
Detailed explanation-4: -If a molecule has areas where there is a partial positive or negative charge, it is called polar, or hydrophilic (Greek for “water-loving"). Polar molecules dissolve easily in water.
Detailed explanation-5: -Polar substances are likely to dissolve in polar solvents. For example, ionic compounds, which are very polar, are often soluble in the polar solvent water.