BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Water absorbs heat when it evaporates and forms a gas
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Water expands and becomes less dense when it freezes.
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Water molecules completely separate into ions in solutions.
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Water forms hydrogen bonds with ions and other polar substances.
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Detailed explanation-1: -Many fish and aquatic plants can survive a cold winter because the layer of ice that forms at the top of the lake insulates the water below and prevents the lake from freezing solid. What unique property of water contributes to this effect? Water expands and becomes less dense when it freezes.
Detailed explanation-2: -The high specific heat for water that covers most of the Earth keeps temperature fluctuations on land and in water within limits that permit life. Water’s high specific heat also helps regulate temperatures in organisms.
Detailed explanation-3: -Water is less dense as a solid than as a liquid. This property is important, as it keeps ponds, lakes, and oceans from freezing solid and allows life to continue to thrive under the icy surface.
Detailed explanation-4: -Water has high heat of fusion: This prevents freezing and ice formation in the protoplasm even when exposed to very low temperature.
Detailed explanation-5: -Capillary action helps bring water up into the roots. With the help of adhesion and cohesion, water can work it’s way all the way up to the branches and leaves.