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प्रश्न
Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer.
उत्तर
Detergent is better for washing clothes in hard water because it does not form insoluble magnesium or calcium salts (scum) on combining with the calcium or magnesium ions present in the hard water. Soap on the other hand reacts with these calcium and magnesium ions present in the hard water to form insoluble calcium and magnesium salts of fatty acids. Therefore, soaps don't lather easily in hard water, while detergents do.
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संबंधित प्रश्न
Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?
Explain the formation of scum when hard water is treated with soap.
Mention the essential material (chemicals) to prepare soap in the laboratory. Describe in brief the test of determining the nature (acidic/alkaline) of the reaction mixture of saponification reaction.
What change will you observe if you test soap solution with a litmus paper (red and blue)? Give reason for your observation.
How is soap made? Write a word equation involved in soap making.
A student takes 4 mL of distilled water in each of four test tubes I, II, III and IV, and then dissolves an equal amount of four different salts namely NaCl in I, CaCl2 in II, MgCl2 in III and KCl in IV. He then adds 8 drops of the given soap solution to each test tube and shakes the contents of the test tube 10 times. In which test tubes will enough lather (foam) be formed ?
(A) I and II
(B) II and III
(C) I and IV
(D) III and IV
Explain the action of soap in removing an oily spot from a piece of cloth.
What are the two different types of molecules found in the soap?
We are using ______ to remove strong stains on the clothes.
The soap molecule has a
