Lesson Worksheet: Air Pollution Chemistry • 10th Grade

In this worksheet, we will practice describing the formation and hazardous consequences of common air pollutants.


Which types of elements are often used to make catalytic converters?

  • ATransition metals
  • BAlkali metals
  • CAlkaline earth metals
  • DSemiconductors
  • EMetalloids


Which of the following chemicals do the unburnt hydrocarbons react with inside a catalytic converter to convert them into less harmful substances?

  • APlatinum
  • BNitrogen
  • CCarbon dioxide
  • DOxygen
  • EWater


Which of the following is not a potential effect of acid rain?

  • ACorroding metal structures
  • BDamaging trees
  • CKilling plants in lakes and rivers
  • DIncreasing the pH of soil
  • EEroding buildings


Which of the following statements explains how acid rain is formed?

  • AWater vapor in the atmosphere reacts with sulfur dioxide creating acid rain.
  • BUnburnt hydrocarbons from fuel bond to ice crystals high in the atmosphere, which then fall as acid rain.
  • CIncomplete combustion of fossil fuels creates CO that reacts with water vapor creating acid rain.
  • DWater evaporates from the oceans and forms clouds, which then falls as acid rain.
  • ESunlight and heat cause changes to ozone to form in clouds creating acid rain.


Which of the following fuels does not produce products that contribute to air pollution when burned?

  • AHydrogen
  • BPetrol
  • CCoal
  • DDiesel
  • EMethane


Which of the following equations shows how CO is removed from exhaust gases by a catalytic converter?

  • A2CO+O2CO22
  • BCO+2HCHOH23
  • CFeO+3CO2Fe+3CO232
  • D8CO+17HCH+8HO28182


Insufficient oxygen inside car engines can result in the production of carbon monoxide. What is the name of this chemical process?

  • AComplete combustion
  • BNeutralization
  • CIncomplete combustion
  • DDecomposition
  • ECatalysis


Which of the following is not a reason why new cars are built to produce less carbon monoxide than cars built in the 1960s?

  • AEngine technology has improved over time.
  • BCarbon monoxide is a toxic gas.
  • CCars that produce less carbon monoxide accelerate more quickly.
  • DScientists now understand more about carbon monoxide’s contribution to air pollution.
  • ECatalytic converters are now fitted to new cars.


As well as other gases, unburnt hydrocarbons are present in exhaust fumes and contribute to air pollution. Which of the following consequences is not related to unburnt hydrocarbons in exhaust fumes?

  • AHealth problems
  • BThe formation of smog
  • CThe formation of acid rain
  • DGlobal dimming


What conditions are present in a car engine that enable the formation of NOx compounds?

  • AThe high temperature in the engine and the absence of air
  • BThe absence of air and petrol or diesel acting as a catalyst
  • CThe high pressure and petrol or diesel acting as a catalyst
  • DThe acidic conditions and a spark from the spark plug
  • EThe high temperature in the engine and a spark from the spark plug

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