BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Only a limited amount of solute can be dissolved in a sample of water.
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Objects with a higher density than water can be observed floating on water.
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The water in lakes, ponds and puddles freezes from top down.
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Water is considered to be a universal solvent.
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Detailed explanation-1: -Water’s lower density in its solid form is due to the way hydrogen bonds are oriented as it freezes. Specifically, in ice, the water molecules are pushed farther apart than they are in liquid water. That means water expands when it freezes.
Detailed explanation-2: -Humans (and other animals that sweat) use water’s high heat of vaporization to cool off. Water is converted from its liquid form to steam when the heat of vaporization is reached.
Detailed explanation-3: -When the temperature increases, molecular movement increases. This change in temperature can lead to phase changes, such as water moving from liquid to solid or from liquid to gas.
Detailed explanation-4: -In ice, the crystalline lattice is dominated by a regular array of hydrogen bonds which space the water molecules farther apart than they are in liquid water. This accounts for water’s decrease in density upon freezing.