Fill in the following blanks with suitable words:

(a) The process of burning of a hydrocarbon in the presence of air to give CO₂, H₂O, heat and light is known as .............
(b) The sodium salt of a long chain fatty acid is called .............
(c) ............. is better than soap for washing clothes when the water is hard.
(d) The organic acid present in vinegar is .............

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Solution

(a) The process of burning of a hydrocarbon in the presence of air to give CO₂, H₂O, heat and light is known as combustion.
(b) The sodium salt of a long chain fatty acid is called soap.
(c) Detergent is better than soap for washing clothes when the water is hard.
(d) The organic acid present in vinegar is ethanoic acid.

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Similar questions

Fill in the following blanks with suitable words :
(a) The process of burning of a hydrocarbon in the presence of air to give $C O_{2}, H_{2} O,$ heat and light is known as ___
(b) The sodium salt of a long chain fatty acid is called ___
(c) ___ is better than soap for washing clothes when the water is hard.
(d) The organic acid present in vinegar is ___

Q. (a) Explain the process of preparation of soap in laboratory.
(b) Why is common salt (sodium chloride) added during the preparation of soap?
(c) Why is soap not suitable for washing clothes when the water is hard?

Q. Consider the following two statements about soap and detergent –
(i) Soaps and detergents are salts of long chain fatty acids.
(ii) Both soap and detergent precipitate scum in hard water.
(iii) Soap is sodium or potassium salt of fatty acids whereas detergents are ammoniuma nd sulphonate salts of fatty acids.
Which of the above statements is (are) true?

Q. Soaps are sodium or potassium salts of long chain fatty acids.

Q. Fill appropriate terms in the blanks .
( white cement , soap, detergent , wearing of bones, tooth decay, hard, soft, Portland, fatty acid )

(a) The substance that helps water to remove dirt from the surface of materials is called ............... .

(b) Fluoride is used in toothpaste to prevent ................ .

(c) Soap is a salt of ............... and sodium hydroxide.

(d) Synthetic detergents can be used in .............. water as well .

(e) For construction purposes ............... cement is the most commonly used cement.

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