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IGCSE C1
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What two gases cause acid rain
SO2 and NOx. Sulfur dioxide and oxides of nitrogen
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is the reaction that forms slacked lime endothermic or exothermic?
Exothermic (gives off heat)
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What is a use of noble gases
neon signs
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How do you get quicklime (CaO) from limestone (CaCO3)
Heating limestone --> quicklime
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This gas is 20x more effective at trapping heat than Carbon dioxide is
Methane CH4
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How do you get slacked lime Ca(OH)2 from quicklime CaO
Adding water
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The hotter an engine the more NOx produced. T or F
T. More reactions of oxygen with Nitrogen occur producing more NOx
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Is the reaction that forms quicklime endothermic or exothermic
endothermic
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What makes up 0.04% of air
Carbon dioxide
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what makes up 21% of air
Oxygen
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Name a way to reduce acid rain or its effects
Scrubbers. Adding lime to water bodies
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A catalytic converter converts nitrogen dioxide and carbon monoxide into what?
Nitrogen and Carbon Dioxide
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What does CO stand for
Carbon Monoxide
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Which pollutants contribute to global warming?
Nitrogen oxides, carbon dioxide, methane
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What happens when you add water to limestone
Nothing. Limestone needs to be heated to turn into quicklime. Once water is added to quicklime slacked lime is produced
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What are hydrocarbons
Compound composed exclusively of hydrogen and carbon.
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What are heavy metals
metals with high density that are toxic at low concentrations
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Give an example of a hydrocarbon
methane, propane, butane, hexane
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What is a use of Nitrogen
Produce ammonia, fertilizers, fill chip bags.
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How is carbon monoxide made
Incomplete combustion of hydrocarbons
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Name 2 ways we can reduce the amount of CO2 released into the environment
alternative transportation, planting trees, burning less fossil fuels
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What is a use of pure oxygen
Making steel, oxygen tanks
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Name 2 ways we release Carbon Dioxide into the environment
Burning fossil fuels, cars, respiring, cutting down forests
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Explain the greenhouse effect
pollutants in our atmosphere trap heat inside causing the earth to warm, like a greenhouse (CH4, CO2, NOx)
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Name 2 ways methane is released into the environment
Cows, Rice fields, landfills
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What makes up 78% of air
Nitrogen
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Which pollutants contribute to photochemical smog?
Nitrogen oxides, carbon monoxide and unburnt hydrocarbons
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Name 2 fossil fuels
coal, oil, natural gas
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What is unleaded low sulfur fuel
Fuel that doesn't have lead and is low in sulfur. Much better for the environment
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What is a negative effect of acid rain
Breaks down limestone buildings, makes water bodies acidic, kills trees. Sulfate reacts with aluminum damaging tree roots and fish gills
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What is the main source of the release of problem gases into the atmosphere
burning of fossil fuels
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This gas binds to hemoglobin in blood, which can lead to death
Carbon monoxide
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Name an impact of global warming
Sea level rise, deserts spread, severe weather
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What is the benefit of the honeycomb in a catalytic converter
increases surface area. More reactions take place. More harmful gases are converted
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