Worksheet: Uses of Metals

In this worksheet, we will practice identifying the uses of metals such as copper, aluminum, and steel based on their physical and chemical properties.

Q1:

Which one of these elements would you not find in a mobile phone?

  • AAluminium
  • BSilicon
  • CCopper
  • DUranium
  • EGold

Q2:

Which of the following is not a potential advantage of steel over aluminum?

  • AHigher strength
  • BLower cost
  • CHigher melting point
  • DLower density
  • EHigher hardness

Q3:

Which of the following is not a potential disadvantage of lead relative to tin?

  • AHigher toxicity
  • BHigher density
  • CLower strength
  • DLower reactivity

Q4:

Which of the following is a major advantage of copper over steel when used as a roofing material?

  • ALower density
  • BHigher thermal conductivity
  • CHigher melting point
  • DHigher corrosion resistance
  • EHigher strength

Q5:

Which of the following values is generally higher for aluminum alloys than for copper?

  • ACost per kilogram
  • BDensity
  • CMelting point
  • DStrength
  • EElectrical conductivity

Q6:

For the storage of liquids, cans made from tin are often preferred over those made from steel. What is the main advantage of tin over steel in this application?

  • AHigher strength
  • BLower density
  • CLower thermal conductivity
  • DLower reactivity
  • ELower cost

Q7:

Aluminum and iron have a range of physical and chemical properties. Based on how the two metals differ, which property can be most easily exploited to separate the two metals when they are being recycled?

  • AMelting point
  • BChemical reactivity
  • CDensity
  • DMagnetism
  • EThermal conductivity

Q8:

In ancient Rome, water was frequently transported through pipes made from lead.

Which of the following is not a property of lead that makes it more suitable than other structural metals for this application?

  • AHigh malleability
  • BLow reactivity
  • CLow cost
  • DHigh strength

The use of water pipes made from lead is now usually avoided. Which potential hazard is mostly responsible for this change?

  • AWater contamination due to dissolution of lead
  • BLeaks due to melting of lead
  • CWater contamination due to rusting of lead
  • DLeaks due to rusting of lead
  • ELeaks due to cracking of lead

Q9:

Metals may be used to transfer thermal energy in heating systems.

Which physical property is most important in the selection of a metal for heating applications?

  • AMelting point
  • BElectrical conductivity
  • CStrength
  • DThermal conductivity
  • EDuctility

What metal is most suitable for use in small-scale heating applications?

  • ACopper
  • BSilver
  • CAluminum
  • DIron
  • ETin

Q10:

Although steel is sometimes used in place of aluminum in automobiles, aluminum is strongly preferred in aircraft. Which property is most responsible for the difference in the use of metals in these applications?

  • AStrength
  • BCost
  • CElectrical conductivity
  • DDensity
  • EMalleability

Q11:

The uses of tin, iron, aluminum, and copper partly depend on their reactivities. Using the elemental symbols, arrange these metals in order of increasing reactivity.

  • A A l < F e < C u < S n
  • B C u < A l < S n < F e
  • C F e < S n < C u < A l
  • D C u < S n < F e < A l
  • E A l < C u < F e < S n

Q12:

Magnesium is a reactive metal that burns in oxygen to produce a bright white flame. Why is it possible to use large blocks of magnesium in construction?

  • AReaction of the magnesium is prevented by galvanization of the blocks.
  • BReaction of the magnesium is limited by the small surface areas of the blocks.
  • CReaction of the magnesium is only possible at high temperatures.
  • DReaction of the magnesium is limited by the formation of an unreactive oxide layer.
  • EReaction of the magnesium is only possible at high oxygen concentrations.

Q13:

Food is placed in airtight metal containers for storage in a mobile refrigerator. The trays may be made from steel or aluminum.

Why is contamination of the food less likely if the containers are made from aluminum rather than steel?

  • A Aluminum is less likely to tear when cooled because it is a more malleable metal.
  • B Aluminum is less corroded by food because it is a less reactive metal.
  • C Aluminum aids refrigeration because it has a higher thermal conductivity.
  • D Aluminum is less corroded by food because it is better protected by surface oxide.
  • E Aluminum is less likely to tear when cooled because it is a stronger metal.

Why is it much less expensive to store, refrigerate, and transport a large quantity of food if the containers are made from aluminum rather than steel?

  • A Aluminum is less dense than steel, so lighter containers may be used.
  • B Aluminum is stronger than steel, so less food is wasted due to breakage of the containers.
  • C Aluminum is less expensive than steel, so the cost of the containers is lower.
  • D Aluminum is stronger than steel, so thinner containers may be used.
  • E Aluminum is more thermally conductive than steel, so less energy is needed to refrigerate the containers.

Q14:

Listed in the table are the physical properties that are prioritized when selecting metals for five different applications.

Application a b c d e
Priority 1 Very low weight Very high thermal conductivity Very high strength Very low cost Very high strength
Priority 2 Corrosion resistance Moderate cost Low weight High malleability Low cost
Priority 3 High malleability High ductility Corrosion resistance Moderate strength Corrosion resistance

For which application would copper be most suitable?

  • Ac
  • Ba
  • Cd
  • Db
  • Ee

For which application would stainless steel be most suitable?

  • Ae
  • Bc
  • Cb
  • Da
  • Ed

For which application would wrought iron be most suitable?

  • Ae
  • Ba
  • Cd
  • Db
  • Ec

For which application would aluminum be most suitable?

  • Aa
  • Be
  • Cd
  • Db
  • Ec

Q15:

The table shows the properties of five different metals.

Metal a b c d e
Strength Very high High Low Moderate Very high
Malleability Low High Very high High Low
Corrosion Resistance Low Low Very high High Very high
Density High High Very high Low Moderate
Cost Low Low Very high Moderate High

Which metal is most suitable for use in aircraft bodies?

  • Ab
  • Ba
  • Cc
  • Dd
  • Ee

Which metal is most suitable for use in mass-produced gates and railings?

  • Ab
  • Bd
  • Cc
  • Da
  • Ee

Which metal is most suitable for use in hip replacements?

  • Ad
  • Ba
  • Ce
  • Db
  • Ec

Q16:

A large bridge is made mostly of steel.

Which physical property of steel makes it most suitable for this application?

  • ALow density
  • BHigh malleability
  • CA high melting point
  • DHigh strength
  • EHigh corrosion resistance

Why is it important to paint the steel regularly?

  • ATo prevent rust formation
  • BTo increase strength
  • CTo decrease brittleness
  • DTo minimize temperature changes
  • ETo fill cracks

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