AP BIOLOGY

BIOCHEMISTRY

PROPERTIES OF WATER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
When a water molecule clings to a wooden surface, and forms a flat sheet of water, it is displaying
A
Adhesion
B
Capillary action
C
Cohesion
D
Surface tension
Explanation: 

Detailed explanation-1: -In fact, the water not only sticks to itself, it sticks to the wood as you can see by looking at the arrows in the picture. This is called adhesion because the attraction is to a different substance. In all systems within which water interacts with another surface, both adhesion and cohesion are factors.

Detailed explanation-2: -Adhesion makes a water drop a drop. Water is highly cohesive-it is the highest of the non-metallic liquids. Water is sticky and clumps together into drops because of its cohesive properties, but chemistry and electricity are involved at a more detailed level to make this possible.

Detailed explanation-3: -Adhesion is the attraction of molecules of one kind for molecules of a different kind, and it can be quite strong for water, especially with other molecules bearing positive or negative charges.

Detailed explanation-4: -and how water molecules interact with other things like leaves or even you. and adhesion means that water likes to stick to other things. This image shows both cohesion and adhesion at work. and cohesion or water wanting to stick to itself is what forms the water droplet.

Detailed explanation-5: -Adhesion occurs because of the polarity of water. Water molecules have an uneven sharing of electrons due to covalent bonding. This creates a negative and positive end of each water molecule. The result is that water is attracted to other molecules with opposite charges.

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