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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
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
Identify the substance underlined, in the following case:
Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide.
State one relevant observation of burning of ammonia in air.
What do you observe when Excess ammonia is mixed with chlorine.
What do you observe when Ammonia is passed over heated lead oxide.
What do you observe when Ammonia solution is added drop by drop and then in excess to aqueous copper sulphate solution.
Differentiate between:
Aqueous ferrous and ferric sulphate solution
- Of the two gases, ammonia and hydrogen chloride, which is more dense? Name the method of collection of this gas.
- Give one example of a reaction between the above two gases which produce a solid compound.
- Write the balanced equation for a reaction in which ammonia is oxidized by:
- a metal oxide,
- a gas which is not oxygen.
Identify the terms for the following:
The experiment which demonstrates high solubility of ammonia gas.
