NURSING EXAM QUESTIONS
BIOCHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water is a solvent.
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Water has a high heat capacity.
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Water acts as a buffer.
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Water is non-polar.
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Detailed explanation-1: -Oceans have a greater heat capacity than land because the specific heat of water is greater than that of dry soil and because a mixing of the upper ocean results in a much larger mass of water being heated than land.
Detailed explanation-2: -Water’s high heat capacity is a property caused by hydrogen bonding among water molecules. When heat is absorbed, hydrogen bonds are broken and water molecules can move freely. When the temperature of water decreases, the hydrogen bonds are formed and release a considerable amount of energy.
Detailed explanation-3: -Because of its high heat capacity, water can minimize changes in temperature. For instance, the specific heat capacity of water is about five times greater than that of sand. The land cools faster than the sea once the sun goes down, and the slow-cooling water can release heat to nearby land during the night.