BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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The solid form of water floats on the liquid form.
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A water molecule is cohesive but not adhesive.
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Liquid water contains an excessive amount of suspended nutrients
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Hydrogen bonding is unable to freeze an entire body of water.
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Detailed explanation-1: -Water is an unusual substance. When water freezes, it gets less dense. That is why ice cubes float in a glass of water. It also takes a lot of energy removal to freeze water, and the air is usually much colder than the earth at the bottom of the lake.
Detailed explanation-2: -The high concentration of salt in ocean water lowers its freezing point from 32° F (0° C) to 28° F (-2° C). As a result, the ambient temperature must reach a lower point in order to freeze the ocean than to freeze freshwater lakes.
Detailed explanation-3: -The layer of ice on the surface of a lake works to insulate the water below. Air pockets form in the ice, like the air bubbles inside an ice cube, and these trap heat much like the multiple layers of blankets or clothes that we’re accustomed to using during the winter months.
Detailed explanation-4: -If water were most dense as a solid, lakes would freeze from the bottom up, eventually freezing solid. In that case, little or nothing would survive in the lake. Most lakes and ponds don’t completely freeze because the ice (and eventually snow) on the surface acts to insulate the water below.