11 mark
Which of the following products are possible from the incomplete combustion of alkanes?
I.
C
II. CO
III.
H2
I and II only
I and III only
II and III only
I, II and III
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Syllabus Edition
First teaching 2023
First exams 2025
|
Energy from Fuels (SL IB Chemistry)
Exam Questions
1 hour18 questions21 mark
Which gas is present in the largest proportion in the exhaust fumes of a car engine?
carbon monoxide
carbon dioxide
water vapour
nitrogen
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31 mark
Which of the following are greenhouse gases?
I.
methane
II. water vapour
III.
argon
I only
I and II only
II and III only
I, II and III
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11 mark
Which volume of oxygen measured at room temperature and pressure is needed for complete combustion of 0.1 mol of propane? (Molar volume = 24dm3 at rtp)
12.0 dm3
5.0 dm3
20.0 dm3
24.0 dm3
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21 mark
Which process converts glucose to ethanol during the production of bioethanol?
Transesterification
Photosynthesis
Fermentation
Cracking
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31 mark
What is the correct equation for the complete combustion of ethane?
C2H6 + 3O2 → 2CO2 + 3H2O
2C2H6 + 7O2 → 4CO2 + 6H2O
2C2H6 + 5O2 → 4CO + 6H2O
C2H6 + 4O2 → 2CO2 + 3H2O
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11 mark
Which compound has an Mr of 84.18 and will react with HBr to give a product with an Mr of 165.09?
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21 mark
What is the whole number coefficient for oxygen when the equation for the combustion of pentanol is balanced?
C5H11OH(g) + O2 → CO2(g) + H2O(g)
7
8
15
16
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31 mark
Which half- equation represents the reaction that happens at the anode in a hydrogen fuel cell that uses an alkaline electrolyte?
2H2 (g) + 4OH– (aq) → 4H2O (l) + 4e–
O2 (g) + 2H2O + 4e– → 4OH– (aq)
2H2 (g) + 4OH– (aq) + 4e- → 4H2O (l)
O2 (g) + 2H2O + 4e– → 4OH– (aq)
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