________ is used in detergents to soften water.

1.	________ is used in detergents to soften water.
A.	Hydraulic acid
B.	Sulphuric acid
C.	Citric acid
D.	Chlorine
Answer» D. Chlorine

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________ is used in detergents to soften water.

________ is used in detergents to soften water.

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