Frank Textbook Solutions: Ammonia

 Page 1


Chapter 9A. Ammonia
Solution 1: 
Ammonia is found both in free state and in combined state. In free state, it is formed in traces 
amount by decaying urine and other organic matter. 
In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and 
ammonium sulphate.
Solution 2:
1. (i) Liquid ammonia – Compressed ammonia gas at 6 atmospheric pressure. Chemical formula 
-NH3
2. (ii) Liquor ammonia – It is saturated solution of ammonia in water. It is very dilute solution of 
ammonium hydroxide (NH
4
OH).
3. A saturated solution of ammonia in water is called liquor ammonia Fortis.
Solution 3: 
PAGE NO : 204 
Page 2


Chapter 9A. Ammonia
Solution 1: 
Ammonia is found both in free state and in combined state. In free state, it is formed in traces 
amount by decaying urine and other organic matter. 
In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and 
ammonium sulphate.
Solution 2:
1. (i) Liquid ammonia – Compressed ammonia gas at 6 atmospheric pressure. Chemical formula 
-NH3
2. (ii) Liquor ammonia – It is saturated solution of ammonia in water. It is very dilute solution of 
ammonium hydroxide (NH
4
OH).
3. A saturated solution of ammonia in water is called liquor ammonia Fortis.
Solution 3: 
PAGE NO : 204 
Solution 4: 
Solution 5: 
Page 3


Chapter 9A. Ammonia
Solution 1: 
Ammonia is found both in free state and in combined state. In free state, it is formed in traces 
amount by decaying urine and other organic matter. 
In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and 
ammonium sulphate.
Solution 2:
1. (i) Liquid ammonia – Compressed ammonia gas at 6 atmospheric pressure. Chemical formula 
-NH3
2. (ii) Liquor ammonia – It is saturated solution of ammonia in water. It is very dilute solution of 
ammonium hydroxide (NH
4
OH).
3. A saturated solution of ammonia in water is called liquor ammonia Fortis.
Solution 3: 
PAGE NO : 204 
Solution 4: 
Solution 5: 
Solution 6: 
Solution 7: 
1. Liquid ammonia is used as refrigerant as:
It is highly volatile
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.
It easily liquefies under pressure at room temperature.
2. Ammonia emulsifies fats and grease. Thus it is used to clean oils, fats and body grease etc. 
from clothes.
Solution 8:
PAGE NO : 205 
Page 4


Chapter 9A. Ammonia
Solution 1: 
Ammonia is found both in free state and in combined state. In free state, it is formed in traces 
amount by decaying urine and other organic matter. 
In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and 
ammonium sulphate.
Solution 2:
1. (i) Liquid ammonia – Compressed ammonia gas at 6 atmospheric pressure. Chemical formula 
-NH3
2. (ii) Liquor ammonia – It is saturated solution of ammonia in water. It is very dilute solution of 
ammonium hydroxide (NH
4
OH).
3. A saturated solution of ammonia in water is called liquor ammonia Fortis.
Solution 3: 
PAGE NO : 204 
Solution 4: 
Solution 5: 
Solution 6: 
Solution 7: 
1. Liquid ammonia is used as refrigerant as:
It is highly volatile
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.
It easily liquefies under pressure at room temperature.
2. Ammonia emulsifies fats and grease. Thus it is used to clean oils, fats and body grease etc. 
from clothes.
Solution 8:
PAGE NO : 205 
3. 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
Solution 9: 
Solution 10: 
Solution 11: 
Page 5


Chapter 9A. Ammonia
Solution 1: 
Ammonia is found both in free state and in combined state. In free state, it is formed in traces 
amount by decaying urine and other organic matter. 
In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and 
ammonium sulphate.
Solution 2:
1. (i) Liquid ammonia – Compressed ammonia gas at 6 atmospheric pressure. Chemical formula 
-NH3
2. (ii) Liquor ammonia – It is saturated solution of ammonia in water. It is very dilute solution of 
ammonium hydroxide (NH
4
OH).
3. A saturated solution of ammonia in water is called liquor ammonia Fortis.
Solution 3: 
PAGE NO : 204 
Solution 4: 
Solution 5: 
Solution 6: 
Solution 7: 
1. Liquid ammonia is used as refrigerant as:
It is highly volatile
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.
It easily liquefies under pressure at room temperature.
2. Ammonia emulsifies fats and grease. Thus it is used to clean oils, fats and body grease etc. 
from clothes.
Solution 8:
PAGE NO : 205 
3. 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
Solution 9: 
Solution 10: 
Solution 11: 
Solution 12: 
Solution 13: