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WorksheetsCarbonates
Total questions: 10
Worksheet time: 5mins
When limestone is heated it forms lime (calcium oxide) and carbon dioxide.
CaCO3(s) → CaO(s) + CO2(g)
Which statement is NOT correct?
Carbon dioxide is a greenhouse gas which may contribute to climate change.
Slaked lime is used to neutralise industrial waste.
The lime can be used to treat alkaline soil.
This reaction is an example of thermal decomposition.
Lime (calcium oxide) is used to treat waste water from a factory. Which substance is removed by the lime?
ammonia
sodium chloride
sodium hydroxide
sulfuric acid
Which process is used to make lime (calcium oxide) from limestone (calcium carbonate)?
chromatography
electrolysis
C fractional distillation
thermal decomposition
When compound X is heated, it changes colour from green to black. Compound Y is formed and a gas is given off which turns limewater milky.
X and Y are ......................................, respectively.
calcium carbonate and calcium oxide
copper carbonate and carbon
copper carbonate and copper oxide
copper sulfate and copper oxide
In which process is carbon dioxide not formed?
burning of natural gas
fermentation
heating lime
respiration
Carbon dioxide is produced when dilute hydrochloric acid reacts with
calcium sulfate.
carbon.
copper(II) carbonate.
limewater.
Two industrial processes that involve heating are
1. extracting iron from its ore using a blast furnace
2. making lime.
In which of these processes is calcium carbonate used?
Process 1
Process 2
Both 2 processes
None of the processes
Limestone can be used to
make lime
make cement
mix with hematite to blast furnace
neutralise acidic soil
Subsatnce is used to treat industrial waste.
What is X and which type of reaction occur during the treatment?
Calcium oxide (lime), neutralisation reaction
Calcium oxide (lime), redox reaction
carbon, neutralisation reaction
carbon, redox reaction
The diagram shows the soil pH range over which a vegetable grows well.
The pH of the soil to be used is 5.5.
Why is lime added to the soil before planting the vegetable?
The lime acts as a catalyst.
The lime changes the soil acidity.
The lime is an indicator.
The lime supplies nitrogen.
