Q.

Which one of the following pairings is incorrect?

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a

 Conductor–copper wire

b

Electroplating–prevents rusting

c

None of these

d

Insulator–pure water

answer is A.

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Detailed Solution

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  • Pure water is also known as distilled water. After the distillation, pure water is obtained. In pure water there is no extra ion to conduct the electricity. Thus, it behaves like an insulator.
  • Copper is the electrical conductor in many categories of electrical wiring.
  • Electroplating is useful for coating a metal (such as copper or silver), to prevent corrosion, and make objects appear shiny and resistant to scratches.
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