BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Because of stronger hydrogen bonds at the surface
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The density of water as a solid is less than the density of water as a liquid
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Surface tension helps it float
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It is more dense
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Detailed explanation-1: -The ice float on water because its density is less than water.
Detailed explanation-2: -The extra hydrogen bonds that occur when water freezes increase the space between molecules, causing a decrease in overall density. In fact, each water ice molecule forms hydrogen bonds with four other molecules, while water molecules only form hydrogen bonds with an average of 3.4 other molecules.
Detailed explanation-3: -What’s so special about ice that causes it to float? Believe it or not, ice is actually about 9% less dense than water. Since the water is heavier, it displaces the lighter ice, causing the ice to float to the top.
Detailed explanation-4: -In ice crystals, their hydrogen bonds link them together like acrobats, stacked one on top of the other, with their arms and legs outstretched. This provides more space between the molecules in the crystal structure of ice than the molecules of liquid water. As a result, ice is less dense than the liquid form.
Detailed explanation-5: -Solution: Density of ice is 0.9 g cm-³ whereas the density of water is 1 g cm-³. Since ice has less density than water, it floats on water.