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Surface tension arises from the cohesive...

Surface tension arises from the cohesive force between the surface molecules, Interplay between cohesion and adhension forces make the surface inclined at acute or obtuse angle with the contacting solid surfaces. This causes a capillary rise (or fall) given as,`h=(2T cos theta)/( rho g r)`where `theta ` = angle of contact, T = surface tension, `rho`=density of the liquid, g = acceleration due to gravity and r = radius of the capillary tube.
If the vessel accelerates up, capillary rise

A

increases

B

decreases

C

remains the same

D

becomes zero

Text Solution

Verified by Experts

The correct Answer is:
B
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Knowledge Check

  • Surface tension arises from the cohesive force between the surface molecules, Interplay between cohesion and adhension forces make the surface inclined at acute or obtuse angle with the contacting solid surfaces. This causes a capillary rise (or fall) given as, h=(2T cos theta)/( rho g r) where theta = angle of contact, T = surface tension, rho =density of the liquid, g = acceleration due to gravity and r = radius of the capillary tube. In capillary rise

    A
    heat is evolved
    B
    `U_( g r)` decrease
    C
    `U_("total")` increase
    D
    heat is absorbed

  • Surface tension arises from the cohesive force between the surface molecules, Interplay between cohesion and adhension forces make the surface inclined at acute or obtuse angle with the contacting solid surfaces. This causes a capillary rise (or fall) given as, h=(2T cos theta)/( rho g r) where theta = angle of contact, T = surface tension, rho =density of the liquid, g = acceleration due to gravity and r = radius of the capillary tube. In capillary action theta can be

    A
    `0^@`
    B
    `90^@`
    C
    `90^@ lt theta lt 180^@`
    D
    all of these

  • The surface tension of a liquid decreases with a rise in

    A
    Diameter of container
    B
    Temperature of the liquid
    C
    Thickness of container
    D
    Viscosity of the liquid

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