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प्रश्न
Match the following
| 1. | Soap | C6H5 OH |
| 2. | Cement | CaSO4.2H2O |
| 3. | Fertilizers | NaOH |
| 4. | Gypsum | RCC |
| 5. | Phenol | NPK |
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उत्तर
| 1. | Soap | NaOH |
| 2. | Cement | RCC |
| 3. | Fertilizers | NPK |
| 4. | Gypsum | CaSO4.2H2O |
| 5. | Phenol | C6H5 OH |
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संबंधित प्रश्न
In a locality, hard water, required for an experiment, is not available. However, the following salts are available in the school laboratory:
1. Sodium sulphate
2. Calcium sulphate
3. Magnesium chloride
4. Sodium chloride
5. Calcium chloride
6. Potassium sulphate
Which of the above salts may be dissolved in water to obtain hard water for the experiment?
(A) 2, 3 and 5
(B) 1, 2 and 5
(C) 1, 2, 4 and 6
(D) 3 and 5 only
State one use of saponification process.
Which of the two is better for washing clothes when the water is hard: soap or detergent? Give reason for your answer.
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
Explain the action of soap in removing an oily spot from a piece of cloth.
Explain why soap cannot be used in hard water.
Analogy:
Used to join components: Adhesives:: Clean the body ______.
______ are substances which can undergo chemical changes to produce certain materials.
In the soap micelles
- Write the formula and draw electron dot structure of carbon tetrachloride.
- What is saponification? Write the reaction involved in this process.
