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प्रश्न
Fill in the following blank with suitable word:
The sodium salt of a long chain fatty acid is called .............
उत्तर
The process of burning of a hydrocarbon in the presence of air to give CO2, H2O, heat and light is known as combustion.
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संबंधित प्रश्न
Would you be able to check if water is hard by using a detergent?
While studying the saponification reaction, what do you observe when you mix an equal amount of colourless vegetable oil and 20% aqueous solution of NaOH in a beaker?
(A) The colour of the mixture has become dark brown
(B) A brisk effervescence is taking place in the beaker
(C) The outer surface of the beaker has become hot
(D) The outer surface of the beaker has become cold
The soap molecule has a ______.
In a soap micelle, the soap molecules are arranged radially with:
(a) ionic ends directed towards the centre and hydrocarbon ends directed outwards
(b) hydrocarbon ends directed towards the centre and ionic ends directed outwards
(c) both ionic ends and hydrocarbon ends directed toward the centre
(d) both hydrocarbon ends and ionic ends directed outwards
What is a soap?
Give a scientific explanation.
Soap forms a precipitate in hard water.
Explain why soap cannot be used in hard water.
Explain why often coloured spots are formed on clothes during washing.
Soaps were originally made from ______.
Match the following
| 1. | Soap | C6H5 OH |
| 2. | Cement | CaSO4.2H2O |
| 3. | Fertilizers | NaOH |
| 4. | Gypsum | RCC |
| 5. | Phenol | NPK |
