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Questions  

Soap helps in cleaning clothes, because

a
Chemicals of soap change
b
It increases the surface tension of the solution
c
It absorbs the dirt
d
It lowers the surface tension of the solution

detailed solution

Correct option is D

Soap helps to lower the surface tension of solution, thus soap get stick to the dust particles and grease and these are removed by action of water.

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Similar Questions

Consider the following statements.
(A) At critical temperature, surface tension of a liquid becomes zero.
(B) At critical temperature, intermolecular forces for liquids and gases become equal. Also liquid can expand without any restriction

Select the correct option.
(a) (A) is false, But (B) is true.
(b) Both (A) and (B) are true.
(c) (A) is true, But (B) is false.
(d) Both (A) and (B) are false.


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