The water proofing agents :

increase the surface tension

T

and decrease the angle of constant

θ

increase both

T

and

θ

decrease both

T

and

θ

decrease

T

and increase

θ

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The water proofing agents :

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Text solutionVerified

waterproofing agent, changes the angle of contact from acute to obtuse, in this way, water beads up on the surface and does not easily penetrate or sticks withe surface.

Now,

As waterproofing agent reduces the sticking capability of water thus forming beads increases the cohesive force which in turn increases surface tension .

hence option B is correct.

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