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प्रश्न
The chemical mostly used in the preparation of most of the soaps we use is
(a) Sodium chloride
(b) Potassium hydroxide
(c) Sodium hydroxide
(a) Potassium chloride
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उत्तर
Sodium hydroxide
Hence, the correct answer is option (c).
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संबंधित प्रश्न
Why is common salt (sodium chloride) added during the preparation of soap?
Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer.
The chemical which is not required for the preparation of soap in the laboratory is:
(a) vegetable oil
(b) baking soda
(c) caustic soda
(d) common salt
Name three chemicals responsible for the surface activity of various detergents.
Explain why often coloured spots are formed on clothes during washing.
The saponification of a fat or oil is done using _____ solution for hot process.
Match the following
| 1. | Soap | C6H5 OH |
| 2. | Cement | CaSO4.2H2O |
| 3. | Fertilizers | NaOH |
| 4. | Gypsum | RCC |
| 5. | Phenol | NPK |
What are the three main constituents of soap?
______ molecules go and join with dirt and oil in the cloth.
What are soaps?
