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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
A student requires hard water for an experiment in his laboratory which is not available in the neighbouring area. In the laboratory there are some salts, which when dissolved in distilled water can convert it into hard water. Select from the following groups of salts, a group, each salt of which when dissolved in distilled water will make it hard.
(A) Sodium chloride, Potassium chloride
(B) Sodium sulphate, Potassium sulphate
(C) Sodium sulphate, Calcium sulphate
(D) Calcium sulphate, Calcium chloride
How is soap made? Write a word equation involved in soap making.
What is the advantage of detergents over soaps for washing clothes?
Give the reason of formation of scum when soaps are used with hard water.
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
Distinguish between esterification and saponification reactions of organic compounds.
Differentiate between:
Detergents and Soaps.
What are the differences between Soap and synthetic detergent?
Water, coconut oil, and _______ are necessary for soap preparation.
What are the two different types of molecules found in the soap?
