when the temperature is increased the angle of contact of a liquid
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When the temperature increases, the angle of contact of liquid .
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Question
When the temperature increases, the angle of contact of liquid __________.
Adecreases
Bincreases
Cremain the same
DNone of these
Medium Open in App Solution Verified by Toppr
Correct option is A)
As the temperature increases, the surface tension and cohesive force among liquid molecules weakens, so the angle of contact with solid surface decreases.
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[Solved] With increase in temperature, the angle of contact in a liqu
The correct answer is option 3) i.e. Decreases CONCEPT: Surface tension is the tendency of water molecules to adhere to each other so as to form t
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With increase in temperature, the angle of contact in a liquid:
First increases and then decreases
Increases Decreases Remains constant
Answer (Detailed Solution Below)
Option 3 : Decreases
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Detailed Solution
Download Solution PDF
The correct answer is option 3) i.e. Decreases
CONCEPT:
Surface tension is the tendency of water molecules to adhere to each other so as to form the minimum surface area possible.
This is a result of cohesion between water molecules.
Consider a solid surface with a liquid placed over it as shown.
Here θMath input error
Math input error
is the contact angle made by the liquid with the solid surface due to surface tension.
Molecules at the surface of a liquid are partly exposed to the surrounding. The molecules at the liquid-air interface experience fewer interactions and have more energy to escape to the surrounding.
The stronger the intermolecular interaction of the liquid, the greater is the cohesion.
EXPLANATION:When the temperature of the liquid is increased, the molecular vibration increases, and thus the intermolecular forces weaken. This reduces the surface tension and cohesion.When surface tension reduces, the tendency of the liquid to form minimum surface area reduces. This means the liquid tends to spread over the surface.
Thus, the contact angle decreases.
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Cohesive force decreases so angle of contact decreases.
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When the temperature increased...
When the temperature increased the angle of contact of a liquid
Updated On: 27-06-2022
( 00 : 20 ) ADVERTISEMENT Text Solution Open Answer in App A increses B decreases C remains the same D
first increases and then decreases
Answer
The correct Answer is B
Solution
Cohesive force decreases so angle of contact decreases.
Answer
Step by step solution by experts to help you in doubt clearance & scoring excellent marks in exams.
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