Answer the questions.[Che-5M]

Question 15 Marks

Name the following compounds.

Answer

According to the question, Given compounds are

Question 25 Marks

What is the difference between soaps and detergents? State in brief the cleansing action of soaps in removing an oily spot from a fabric. Why are soaps not very effective when a fabric is washed in hard water? How is this problem resolved?

Answer

i. Soaps are sodium salts of fatty acids whereas Detergents are sodium salts of sulphonic acids. Soaps do not act in hard water due to formation of scum while detergents do.
ii. In soaps carbon chain dissolves in oil and the ionic end dissolves in water to form micelle

iii. Hard water contains $\mathrm{Ca}^{2+} / \mathrm{Mg}^{2+}$ ions that react with soap and form precipitates called scum.
iv. By using detergents in hard water this problem can be resolved.

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Science Answer the questions.[Che-5M]

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