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. Metals have a greater capacity to withstand deformation, while plastics are softer and more easily scratched or deformed.
Step 2
How do most metals compare to most plastics in terms of (ii) lustre?
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Answer
Metals typically exhibit a shiny appearance or lustre due to their ability to reflect light effectively. In contrast, plastics usually have a more dull or faded appearance unless specifically treated.
Step 3
What property of the plastic PVC makes it suitable for use in electrical cable?
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Answer
PVC provides excellent electrical insulation. It does not conduct electricity, making it safe for use in electrical cables. Additionally, it is flexible, allowing for easy installation.
Step 4
Give an advantage of using PVC for plumbing in place of copper pipes.
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PVC pipes are lighter and do not corrode, which allows for easier handling and installation. They offer better insulation from temperature changes, do not conduct electricity, and are typically more cost-effective.
Step 5
What metallic property allows copper to be (iii) hammered or rolled into sheets for use in roofing?
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Answer
The property of malleability allows copper to be hammered or rolled into thin 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
Ductility is the property that allows copper to be drawn into long strands or wires. This enables the production of thin, flexible electrical wiring.
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