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Which of the following is the best conductor of Electricity ?

  • A.Sea water
  • B.Boiled water
  • C.Distilled water
  • D.Ordinary water

Answer: A

Sea water is the best conductor of those listed, because it carries a high concentration of dissolved ions - about 3.5 per cent salt.

It is the ions, not the water, that carry the current: pure distilled water is a very poor conductor, and ordinary tap water conducts only because of the salts dissolved in it.

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