Statement:Water may be one of the most familiar substances on the planet, but it certainly isnt ordinary. In fact, waters unique chemical properties make it so complicated that even after decades of research, scientists still have much to learn about this remarkable and versatile substance. Thats water, as in the clear, sparkling fluid that covers three quarters of the Earths surface-not to mention the basis of life as we know it, and possessor of the worlds most recognizable chemical formula (H2O). Water is everywhere. And yet, scientists are still learning about its properties. Water simply doesnt behave like other liquids.Question:Which of the following is not a special property of water?

PROPERTIES OF WATER

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

Statement:Water may be one of the most familiar substances on the planet, but it certainly isn’t ordinary. In fact, water’s unique chemical properties make it so complicated that even after decades of research, scientists still have much to learn about this remarkable and versatile substance. That’s water, as in the clear, sparkling fluid that covers three quarters of the Earth’s surface-not to mention the basis of life as we know it, and possessor of the world’s most recognizable chemical formula (H2O). Water is everywhere. And yet, scientists are still learning about its properties. Water simply doesn’t behave like other liquids.Question:Which of the following is not a special property of water?

A	Water has the ability to moderate temperature
B	Water is polar, therefore it is very adhesive
C	Water contracts when it freezes
D	Water is polar, therefore it is very cohesive

Explanation:

Detailed explanation-1: -Unique properties of water Water molecules are polar, with partial positive charges on the hydrogens, a partial negative charge on the oxygen, and a bent overall structure. This is because oxygen is more electronegative, meaning that it is better than hydrogen at attracting electrons. Water is an excellent solvent.

Detailed explanation-2: -Water is the only naturally occurring substance on Earth that can be found in three physical states: solid, liquid, and gas. In its solid form (ice), it is less dense than when it is in its liquid form (This is why ice floats in a glass of water).

Detailed explanation-3: -Water’s extensive capability to dissolve a variety of molecules has earned it the designation of “universal solvent, ” and it is this ability that makes water such an invaluable life-sustaining force. On a biological level, water’s role as a solvent helps cells transport and use substances like oxygen or nutrients.

Detailed explanation-4: -However, water has a unique property in terms of density. Its hydrogen bonds make solid ice less dense than liquid water and allow ice to float (Figure 4).

There is 1 question to complete.

AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER