Which of the following statements is true?
Correct answer: C. Soap is used effectively only in soft water while detergent can be used in soft as well as hard water
- A. Soaps and detergents both are used only in soft water
- B. Soaps and detergents both are used in soft as well as hard water
- C. Soap is used effectively only in soft water while detergent can be used in soft as well as hard water
- D. Detergent is used only in soft water, while soap is used in soft and hard water
Explanation
Soaps react with the calcium and magnesium ions in hard water to form an insoluble precipitate called scum. Detergents are formulated with different structures (like sulfonates) that do not form precipitates with these ions, making them effective in both soft and hard water.
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Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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