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प्रश्न
List the properties of ammonia that make it
(i) A good refrigerant
(ii) A cleaning agent
(iii) As a source of hydrogen
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उत्तर
(i) Liquid ammonia is used as refrigerant as:
(a) It is highly volatile
(b) It has high specific latent heat of vaporization. 1 mole (17g) of liquid ammonia vaporises by absorbing 5.7 kcals of heat from the surroundings, which is there by cooled.
(c) It easily liquefies under pressure at room temperature.
(ii) Ammonia emulsifies fats and grease. Thus it is used to clean oils, fats and body grease etc. from clothes.
(iii) Liquid hydrogen is dangerous to transport as it is highly combustible. Thus, hydrogen is converted to liquid ammonia and transported in cylinders. Later it is catalytically converted to hydrogen.
Key: Uses of ammonia
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संबंधित प्रश्न
State what you observe when a piece of moist red litmus paper is placed in a gas jar of ammonia.
Complete the following equation. What property of ammonia is illustrated by the reaction given below.
2NH3 + 3CuO →
Give the formula of (i) Liquid ammonia (ii) Liquor ammonia
Choose the correct word or phrase from the bracket to complete the following sentence:
Heating ammonium chloride with sodium hydroxide produces ______.
The diagram shows a simple arrangement of the fountain experiment:
(i) Name the two gases you have studied which can be used in this experiment
(ii) What is the common properly demonstrated by this experiment
What do you observe when Ammonia solution is added drop by drop and then in excess to aqueous copper sulphate solution.
Differentiate between:
Action on indicators or dry ammonia gas and aqueous ammonia
How is ammonia soluble in water?
Write an equation to illustrate the reducing nature of ammonia.
Identify the terms for the following:
The experiment which demonstrates high solubility of ammonia gas.
