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Q.

Water drops stick to a glass surface due to

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a

Adhesion

b

Flocculation

c

Cohesion

d

None of these

answer is B.

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Detailed Solution

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  • Water likes to stick to itself, but under certain circumstances, it actually prefers to stick to other types of molecules. 
  • 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.
  • For instance, adhesion enables water to the surface of the glass.
  • The water molecules are more strongly attracted to the glass than they are to other water molecules (because glass molecules are even more polar than water molecules).
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