BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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nonpolar substances that repel water molecules
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nonpolar substances that have an attraction for water molecules
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polar substances that repel water molecules
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polar substances that have an affinity for water
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charged molecules that hydrogen-bond with water molecules
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Detailed explanation-1: -Molecules that repel water because they are nonpolar molecules are described with the adjective hydrophobic. Hydrophobic molecules such as alkanes, oils, fats, and greases do not dissolve in water. This characteristic is called hydrophobicity. In chemistry, we call hydrophobic molecules hydrophobes.
Detailed explanation-2: -These include ionic compounds, polar molecules (for example, sugars), and some proteins. Hydrophobic substances, such as oils, are nonpolar and do not dissolve in water.
Detailed explanation-3: -Hydrophobes are nonpolar molecules and usually have a long chain of carbons that do not interact with water molecules.
Detailed explanation-4: -Hydrophobic substances are composed of non-polar molecules that repel bodies of water and attract other neutral molecules and non-polar solvents. Examples of these molecules are alkanes, oils and fats in general.
Detailed explanation-5: -Alkanes, oils, fats, greasy compounds, and the majority of organic compounds are hydrophobic in nature. The applications of hydrophobic substances include the removal of oil from aqueous solutions, oil spills managements, and the chemical separation process to separate the non-polar elements from the polar ones.