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प्रश्न
How will you check with the help of soap powder whether water is hard?
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उत्तर
- In hard water (from a well or a tube well), soap does not foam but instead creates scum.
- As a result, soap loses its cleaning ability. So, using soap, we can determine that the water is hard.
संबंधित प्रश्न
List two problems that arise due to the use of detergents instead of soaps.
Distinguish between esterfication and saponification reaction with the help of the chemical equations for each.
State one use of saponification process.
What change will you observe if you test soap solution with a litmus paper (red and blue)? Give reason for your observation.
Describe the structure of a soap molecule with the help of a diagram.
Which one of the following sets of materials can be used to prepare soap?
(A) Neem oil and calcium hydroxide
(B) Castor oil and sodium hydroxide
(C) Mineral oil and sodium hydroxide
(D) Neem oil and magnesium hydroxide
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
Explain why synthetic detergents are superior to soap.
Explain why often coloured spots are formed on clothes during washing.
What are the similarities between Soap and synthetic detergent.
