Detergents are used with water in cleaning clothes to

reduce its surface tension

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increase its surface tension

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detergents do not affect surface tension

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none of these

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Solution

The correct option is A reduce its surface tension
To make water wash better, we have to reduce its surface tension so it wets things more uniformly. And that's precisely what a surfactant does. The surfactants in detergents improve water's ability to wet things, spread over surfaces, and seep into dirty clothes fibers.

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Similar questions

Write answer to the following questions.

(a) How does the use of a detergent help to clean soiled clothes ?

(b) How will you check with the help of soap powder whether water is hard ?

(c) What are the important ingredients of a toothpaste , and what is the function of each ?

(d) What are the ingredients of cements ?

(e) What will happen if cement is not used in making concrete ?

(f) Make a list of detergents that you use.

(g) What should be expected from a detergent for delicate garments ?

(h) What is meant by ' surface activity'? Name three chemicals responsible for the surface activity of various detergents.

Q. Detergents used for cleaning clothes and utensils contain?

Q. Explain Why -

(a) Soap cannot be used in hard water .
(b) Oil does not mix in water . However, oil and water become homogeneous if a sufficient quantity of detergent is added .
(c) Synthetic detergents are superior to soap .
(d) Often coloured spots are formed on clothes during washing .
(e) Tobacco masheri should not be used for cleaning teeth.

Q. Detergents reduce the surface tension of the solution

Q. If water contains dissolved calcium hydrogencarbonate, out of soaps and synthetic detergents which one will you use for cleaning clothes ?

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