11 markeasy
Which gas is present in the largest proportion in the exhaust fumes of a car engine?
Choose your answer
Carbon dioxide
Carbon monoxide
Nitrogen
Water vapour
Chemistry — AS
Nitrogen & Sulfur — Multiple-Choice Questions (Cambridge International AS Chemistry): Exam Questions
Exam code:970117 questions · 17 marks · ≈ 17 min
21 markeasy
Oxidation of ammonia by oxygen is the first step in the manufacture of nitric acid, which is used in the production of the synthetic material nylon.
wO2 (g) + xNH3 (g) → yNO (g) + zH2O (g)
Which row gives the correct values for w, x, y and z?
| w | x | y | z | |
|---|---|---|---|---|
| A | 5 | 4 | 4 | 6 |
| B | 5 | 6 | 4 | 4 |
| C | 6 | 5 | 4 | 5 |
| D | 6 | 6 | 5 | 4 |
Choose your answer
31 markeasy
According to the Brønsted-Lowry theory, which term describes ammonia?
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Acid
Amphoteric
Base
Neutral
41 markeasy
Which statement about the ammonium ion, NH4+, is correct?
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All bond angles are 107°
Ammonium ions are formed when ammonia behaves as an acid.
Ammonium ions are unreactive when heated with aqueous sodium hydroxide.
The bonds are all the same length.
51 markeasy
Which reaction that takes place in a catalytic converter does not remove hazardous gases from car exhaust?
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CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)
2CH4 (g) + 3O2 (g) → 2CO (g) + 4H2O (g)
2CO (g) + O2 (g) → 2CO2 (g)
2CO (g) + 2NO (g) → 2CO2 (g) + N2 (g)
61 markeasy
The manufacture of ammonium nitrate, NH4NO3, occurs on a large scale for use as a fertiliser.
Which statement about ammonium nitrate fertiliser is not correct?
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It can cause environmental problems.
It consists of 35% nitrogen by mass.
It is insoluble in water.
Nitric acid is used in its manufacture.
71 markeasy
Oxides of nitrogen are released into the atmosphere in car engine exhaust fumes.
Which environmental problem is not made worse by this occurrence?
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Acidification of lakes
Corrosion of buildings
Photochemical smog
The enhanced greenhouse effect
81 markmedium
Which statement about ammonia is correct?
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Ammonia acts as a nucleophile by accepting a pair of electrons when it reacts with bromoethane.
Ammonia can form a co-ordinate bond with a hydrogen ion to form an ammonium ion.
Ammonia is a base and accepts hydroxide ions.
The shape of the ammonia molecule is pyramidal with bond angles of 109.5°
91 markmedium
“Photochemical smog is produced when 1 acts on 2 and 3 .”
Which row correctly identifies 1, 2 and 3?
| 1 | 2 | 3 | |
|---|---|---|---|
| A | Heat | Hydrocarbons | Oxygen |
| B | Heat | Nitrogen | Oxygen |
| C | Sunlight | Nitrogen oxides | Hydrocarbons |
| D | Sunlight | Nitrogen oxides | Sulfur oxides |
Choose your answer
101 markmedium
Lime, CaO, is used to reduce the acidity of soil, and ammonium nitrate is a nitrogenous fertiliser.
Which statement explains why these two substances not be mixed together?
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Calcium nitrate is produced, which hardens water.
If damp, ammonia is given off.
If damp, nitric acid will form.
The dry mixture is explosive.
111 markmedium
Nitrogen dioxide, NO2, sulfur dioxide, SO2, and carbon monoxide, CO, are all atmospheric pollutants.
Which reaction takes place in the atmosphere?
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CO is spontaneously oxidised to CO2
NO2 is reduced to NO by CO
NO2 is reduced to NO by SO2
SO2 is oxidised to SO3 by CO2
121 markhard
In a car engine, multiple reactions take place as molecules are mixed with oxygen at high temperatures.
Which of these reactions is endothermic?
Choose your answer
CH4 (g) + 2O2 (g) → CO2 (g) + 2H2O (g)
N2 (g) + O2 (g) → 2NO (g)
2NO (g) + O2 (g) → 2NO2 (g)
S (s) + O2 (g) → SO2 (g)
131 markhard
Which reaction of ammonia does not involve the nitrogen atom's lone pair?
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2NH3 (aq) + Ag+ (aq) → [Ag(NH3)2]+ (aq)
NH3 (g) + CH3I (g) → CH3NH3+I- (s)
NH3 (g) + HCl (g) → NH4Cl (s)
2NH3 (l) + 2Na (s) → 2NaNH2 (s) + H2 (g)
141 markhard
Car exhausts release pollutant gases including oxides of nitrogen.
In cities, when a car travels one kilometre, it releases 0.23 g of an oxide of nitrogen NxOy under room conditions, which occupies 120 cm3.
Which row gives the correct values for x and y?
| x | y | |
|---|---|---|
| A | 1 | 1 |
| B | 1 | 2 |
| C | 2 | 1 |
| D | 2 | 4 |
Choose your answer
151 markhard
Ammonium sulfate in the soil is slowly oxidised by air, producing sulfuric acid, nitric acid and water as the only products.
How many moles of oxygen gas are needed for the complete oxidation of one mole of ammonium sulfate?
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1
2
3
4
161 markhard
Aqueous ammonia is added to aqueous sulfur dioxide until just alkaline.
Which salt is produced in this reaction?
Choose your answer
(NH4)2SO3
(NH4)2SO4
NH4HSO3
NH4HSO4
171 markhard
The gases nitrogen dioxide (NO2) and sulfur trioxide (SO3) are required during the formation of acid rain.
In a simulation experiment, a volume of 6.00 dm3 of sulfur trioxide gas is measured under room temperature and pressure (r.t.p.). A total of 0.75 mol of nitrogen dioxide is also present in the reaction chamber along with water vapour.
What is the final amount, in mol, of nitrogen dioxide in the reaction chamber after all the sulfur trioxide has reacted to form acid rain?
Choose your answer
0
0.25
0.50
0.75