Class 10 FRANK Solutions Chemistry Chapter 9  A  Ammonia
Revise your Chemistry lessons effectively with Frank Solutions for ICSE Class 10 Chemistry Chapter 9 A – Ammonia. TopperLearning’s solutions will guide you on how to explain the solubility of ammonia in water. Revise the equations for the action of heat on ammonium nitrate and ammonium chloride. Also, relearn the uses of ammonium chloride.
Our ICSE Class 10 Chemistry Frank Solutions will also help you with understanding the difference between liquid ammonia and liquid ammonia fortis. To study more about ammonia, you can browse through our Selina Solutions, concept videos and other learning materials.
Ammonia Exercise 219
Solution 1
In combined state, ammonia is found as ammonium salts mainly as ammonium chloride and ammonium sulphate.
Solution 2
(ii) Liquor ammonia  It is saturated solution of ammonia in water. It is very dilute solution of ammonium hydroxide (NH_{4}OH).
(b) A saturated solution of ammonia in water is called liquor ammonia Fortis.
Solution 3
Solution 4
Ammonia Exercise 220
Solution 5
Solution 6
Solution 7
Solution 8
(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
Solution 9
Solution 10
Solution 11
Solution 12
Solution 13
Solution 14
Solution 15
Ammonia Exercise 221
Solution 16
Solution 17
Solution 18
Solution 19
Solution 20
(a) (i) Use of Ammonium Chloride
Used in Leclanche cell and dry cell
(ii) Use of Ammonium Sulphate
Used as a fertilizer
(iii)use of Ammonium nitrate
Used in fireworks
(i) Use of Ammonium Carbonate
Used in baking powder
(b) Test of ammonia and ammonium ions:
(i) Ammonia gas has a characteristic pungent smell
(ii) A glass rod dipped in concentrated hydrochloric acid and is introduced into the gas produces thick white fumes of ammonium chloride.
Solution 21
Solution 22
Solution 23
A chlorofluorocarbon (CFC) is an organic compound which contains carbon, chlorine and fluorine produced as a volatile derivative of methane and ethane.
Pure ammonia gas is highly toxic to humans and would pose a threat if the refrigerator were to leak. Hence, CFCs became popular as a substitute of ammonia as a refrigerant.
Solution 24
(i) Hydrochlorofluorocarbon (CF_{3}CHCl_{2})
(ii) Hyrofluorocarbon (HFC)
Ammonia Exercise 222
Solution 25
(i) Slacked lime
(ii) NCl_{3}, HCl
(iii) K_{2}HgI_{4}
(iv) Cu and N_{2}
(v) Haber's process
(vi) High heat of vaporisation
(vii) To increase the activity of the catalyst
Solution 19921
Solution 19922
Solution 19923
Ammonia forms weakly basic solution when dissolved in water.
The others give acidic solution when dissolved in water.
Solution 19924
Solution 19925
(ii) It is used in the industrial preparation of nitric acid by Ostwald's process.
Solution 19931
Solution 19932
Ammonia Exercise 223
Solution 19941
Solution 19942
Solution 19943
Solution 19951
Solution 19952
1. It is a pungent smell gas.
2. It gives white precipitate when bubbles through a solution of lead nitrate.
3. It gives a brown colour or precipitate when treated with Nessler's reagent.
Solution 19953
Solution 19954
Solution 19955
Solution 19956
Ammonia is collected in an inverted dry gas jar by the downward displacement of air.
Solution 19957
Solution 19961
Solution 19962
Solution 19963
Gaseous inputs in Haber's process are dry nitrogen and dry hydrogen gas. They are mixed in the ratio of 1:3 by volume.
The following conditions favour maximum yield of ammonia:
(a) Low temperature
(b) High pressure
(c) Use of catalyst
The gases after reaction pass through condensing pipes of cooling chamber where ammonia gets liquefied and is collected in receiver.
Ammonia can also be collected by downward displacement of air.
Solution 19971
Ammonia Exercise 224
Solution 19972
Solution 19981
Solution 19982
Solution 19983
Solution 19984
Solution 19985
Solution 19991
(ii) Nitrogen
Solution 20011
Solution 20012
Solution 20013
Solution 20014
Aqueous solution of ammonia is weakly basic in nature due to presence of hydroxyl ion.
Solution 20021
Solution 20022
Ammonia Exercise 225
Solution 20031
Solution 20032
Solution 20034
Solution 20041
Solution 20042
Solution 20051
Solution 20052
Solution 20061
Solution 20062
Solution 20071
Solution 20072
Solution 20033
Ammonia is highly soluble in water and so it is not collected over water.
Ammonia Exercise 226
Solution 20081
Solution 20101
Solution 20102
(i) Ammonia burns with a yellowish flame. It produces water vapour and nitrogen.
(ii) When ammonium hydroxide is brought near the mouth of concentrated hydrochloric acid, it produces dense white fumes of ammonium chloride.
Solution 20103
(i) Haber's process
(ii) 1 part of nitrogen and 3 parts of hydrogen
(iii) Finely divided iron (Fe)
(iv)
(v)
Solution 20104
(i) Ammonia and hydrogen chloride gas
(ii) High solubility of gases in water
Ammonia Exercise 227
Solution 20111
(i) Ammonia
(ii)
(iii) By downward displacement of air
(iv) Quicklime/CaO
(v) Bring moist red litmus paper to the mouth of the inverted jar; it immediately turns blue.
Or
Bring a glass rod dipped in hydrochloric acid to the
mouth of the inverted jar. If it produces dense white
fumes, then the jar is full of gas.
Solution 20131
Name of the process 
Temperature 
Catalyst 
Equation for the catalyzed reaction 
Haber's Process 
450500^{o}C 
Finely divided iron (Fe) 

Solution 20132
(a)
(b) C + 4HNO_{3}→ CO_{2} + 2H_{2}O + 4NO_{2}
Solution 20141
(i) Hydroxyl (OH^{}) ion other than ammonium ion
(ii) Red litmus turns blue, methyl orange turns yellow and phenolphthalein turns pink.
Solution 20151
(i) 2NH_{4}Cl + Ca(OH)_{2}→ CaCl_{2 }+ 2H_{2}O + 2NH_{3}
(ii) NH_{3} + 3Cl_{2}→ NCl_{3} + 3HCl
(nitrogen trichloride)
(iii) 2NH_{3}+H_{2}SO_{4}→ (NH_{4})_{2}SO_{4}
(ammonium sulphate)
Ammonia Exercise 228
Solution 20161
(i) Ammonia
(ii) Nitrogen
Solution 20162
(i) 8NH_{3} + 3Cl_{2}→ N_{2} + 6NH_{4}Cl
(ii) 3PbO + 2NH_{3 }→3Pb + 3H_{2}O + N_{2}
Solution 20171
(i) Cation that does not form a precipitate with ammonium hydroxide but forms one with sodium hydroxide: Ca^{2+}
(ii) A solid formed by a reaction of two gases, one of which is acidic and the other basic in nature: Salt
Solution 20172
(i) 3CuO + 3NH_{3}→ 3Cu + 3H_{2}O + N_{2}↑
(ii) 2NH_{4}Cl + Ca(OH)_{2} → CaCl_{2} + 2H_{2}O + 2NH_{3}↑
(iii)
Solution 20173
Since ammonia is not a supporter of combustion, it extinguishes a burning splint and does not burn in air.
Solution 20174
(i) A = NaHSO_{4} + HCl
B = upward displacement of air
(ii) C = Mg_{3}N_{2} + H_{2}O
D = quicklime
E = downward displacement of air