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Question
A tester is used to check the conductivity of an unknown solution of water. What can be concluded, if the bulb of the tester glows brightly?
Options:
A .  The solution consists of impurities.
B .  The solution is transparent.
C .  The solution consists of ions.
D .  The solution is opaque.
Answer: Option C
:
C
A solution conducts electricity if it contains ions. Ions have the ability to receive or donate electrons and hence acts as charge carriers within a liquid solution.

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