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Question
Explain why often coloured spots are formed on clothes during washing.
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Solution
The laundry, skincare, beauty, and personal hygiene products that we use commonly can cause stains and color changes in our clothes. Toothpaste, perspiration, facial soap, deodorants, hair sprays, strong perfumes with alcohol, and even rain are often the causes of stains on garments. All these stains may eventually dry up, not causing any visible stain; however, age and exposure to heat will cause them to reappear.
RELATED QUESTIONS
Why do soaps not form lather in hard water?
Why is common salt (sodium chloride) added during the preparation of soap?
What is the advantage of detergents over soaps for washing clothes? Also state one disadvantage.
Explain the cleansing action of soap. Draw diagrams to illustrate your answer.
In a soap micelle, the soap molecules are arranged radially with:
(a) ionic ends directed towards the centre and hydrocarbon ends directed outwards
(b) hydrocarbon ends directed towards the centre and ionic ends directed outwards
(c) both ionic ends and hydrocarbon ends directed toward the centre
(d) both hydrocarbon ends and ionic ends directed outwards
A student is testing water to know which is best for cleansing purposes with soaps. He would find that the cleansing action of soaps is best when he uses water obtained from
(a) rain
(b) tap
(c) hand pump
(d) pond
What is a soap?
We are using ______ to remove strong stains on the clothes.
Analogy:
Used to join components: Adhesives:: Clean the body ______.
In the soap micelles
