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Question

Distilled water is a poor conductor of electricity. On the other hand, tap water when brought into contact with an electrical conductor can cause fatal electrocution. What makes the difference?

A
Tap water has extra electrons.
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B
Impurities in tap water has ions.
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C
Tap water has static electricity.
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D
Tap water has a conductor in it.
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Solution

The correct option is B Impurities in tap water has ions.
A liquid can conduct electricity only if it has ion present in it.
In tap water, rainwater and seawater, there are impurities which contains ions of sodium (Na+), calcium (Ca2+),
and magnesium (Mg2+). In distilled water, however, there are no impurities and therefore no ions.
Thus, distilled water is unable to conduct electricity.

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