How do most metals compare to most plastics in terms of (i) hardness, (ii) lustre?
Copper is used as a building material for roofing, plumbing and wiring - Leaving Cert Chemistry - Question c - 2018
Question c
How do most metals compare to most plastics in terms of (i) hardness, (ii) lustre?
Copper is used as a building material for roofing, plumbing and wiring. The plast... show full transcript
Worked Solution & Example Answer:How do most metals compare to most plastics in terms of (i) hardness, (ii) lustre?
Copper is used as a building material for roofing, plumbing and wiring - Leaving Cert Chemistry - Question c - 2018
Step 1
How do most metals compare to most plastics in terms of (i) hardness?
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Answer
Metals are generally harder than most plastics. This is a crucial property that makes metals suitable for applications where strength is required. In comparison, plastics are often softer.
Step 2
How do most metals compare to most plastics in terms of (ii) lustre?
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Answer
Metals typically have a shiny appearance, or lustre, due to their smooth surfaces which reflect light well. In contrast, most plastics have a duller finish.
Step 3
What property of the plastic PVC makes it suitable for use in electrical cable?
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Answer
The plastic PVC provides electrical insulation, preventing the conduction of electricity, which enhances safety in electrical applications.
Step 4
Give an advantage of using PVC for plumbing in place of copper pipes.
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Answer
Using PVC for plumbing offers several advantages: it is lighter than copper, which makes it easier to handle and install. Additionally, PVC does not corrode, resulting in lower maintenance costs and increased durability over time.
Step 5
What metallic property allows copper to be: (iii) hammered or rolled into sheets for use in roofing?
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Answer
Copper's malleability allows it to be hammered or rolled into sheets, making it ideal for roofing applications.
Step 6
What metallic property allows copper to be: (iv) drawn into long strands for use in wiring?
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Answer
Copper is ductile, which enables it to be drawn into long strands or wires without breaking.
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