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WorksheetsC9-8 Combustion 8EW
Total questions: 28
Worksheet time: 16mins
24 g of Magnesium reacts with 16 g of oxygen. What mass of magnesium oxide will be produced?
34 g
16 g
8 g
40 g
What compounds are commonly burned as fuels?
hydrogencarbonates
metal oxides
hydrocarbons
oxygen
What is limewater used to test for?
Oxygen
Water
Carbon dioxide
Methane
What is CH4?
carbon monoxide
soot
water
methane
The names and formulae of three compounds in the same series are:
Ethane C2H6
Propane C3H8
Butane C4H10
The next member in the series is pentane.
What is the formula of pentane?
C5H10
C5H11
C5H12
C5H13
What are the products of complete combustion of a hydrocarbon fuel?
carbon dioxide and water
oxygen and carbon dioxide
carbon (soot) and water
carbon monoxide and water
What is the cause of the smoky flame seen during the incomplete combustion of a hydrocarbon?
carbon dioxide
carbon (soot)
carbon monoxide
water vapour
What is the test for carbon dioxide?
turns limewater chalky
relights a glowing splint
ignites with a 'pop' sound
turns cobalt chloride paper pink
What is the test for water?
turns limewater chalky
relights a glowing splint
ignites with a 'pop' sound
turns cobalt chloride paper pink
What toxic gas is produced during the incomplete combustion of hydrocarbons?
carbon
carbon dioxide
carbon monoxide
water vapour
Coal is a fossil fuel made mostly of the element carbon.
Use the graph to work out the % of carbon in coal.
0 %
24 %
55 %
85 %
What is the relationship between the number of carbon atoms in a hydrocarbon and its boiling point?
the greater the number of carbon atoms the higher the boiling point
the greater the number of carbon atoms the lower the boiling point
boiling point decreases with increasing carbon atoms
the greater the number of carbon atoms the less flammable they are
This apparatus was used to study the combustion of a hydrocarbon fuel.
What substance caused the anhydrous copper sulfate to turn from white to blue?
carbon dioxide
methane
carbon (soot)
water vapour
What was solution X?
hydrocarbon fuel
water
limewater
universal indicator
What substance is needed in excess to ensure the complete combustion of a hydrocarbon fuel?
(a)
Why is carbon monoxide hazardous?
It causes climate change
It stops red blood cells carrying oxygen
It causes asthma attacks
It irritates the lungs causing severe coughing
What numbers are missing?
CH4 + ___O2 ---> CO2 + ___H2O
1, 1
1, 2
2, 1
2, 2
What elements are found in hydrocarbons?
oxygen and carbon
carbon and methane
water and oxygen
carbon and hydrogen
What three things are needed for combustion to take place?
water, carbon dioxide, fuel
heat, oxygen, fuel
fuel, oxygen, carbon dioxide
water, fuel, oxygen
Which of the following statements about chemical reaction is true?
Chemical reactions create new atoms
Chemical reactions cause atoms to break down
Chemical reactions cause the arrangement of atoms to change
Chemical reactions always result in an increase in mass
What gas released when fossil fuels burn causes acid rain?
water vapour
carbon monoxide
sulfur dioxide
methan
Which living things are used as indicators of air pollution levels?
algae
lichen
fungi
mosses
What are the three effects of acid rain?
kills plants, causes the greenhouse effect, causes asthma
kills plants, kills animals, kills humans
kills plants, kills aquatic life, erodes metal and stone
causes climate change, erodes metal and stone, kills aquatic life
What does this diagram show?
climate change
acid rain
gravitational forces
the greenhouse effect
Which greenhouse gas is rising due to deforestation and the burning of fossil fuels?
sulfur dioxide
carbon monoxide
carbon dioxide
methane
Which greenhouse gas is rising due to cattle farming and growing rice?
sulfur dioxide
carbon monoxide
carbon dioxide
methane
Which natural process REMOVES carbon dioxide from the atmosphere?
respiration
combustion
water cycle
photosynthesis
Which of the following is NOT a potential consequence of climate change?
increased numbers of earthquakes and volcanic eruptions
increased numbers of storms and extreme weather events
flooding
changes in the distribution of living things
