McqMate
| Q. |
Which of the following is a conductor of electricity? |
| A. | Rubber |
| B. | Pure water |
| C. | Salt water |
| D. | Benzene |
| Answer» C. Salt water | |
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Explanation: Pure water is actually an extremely poor conductor, but saturated salt water is a good conductor. The saltier the water, the better the conductance. The reason it conducts electricity is because the NaCl (sodium chloride) breaks apart into a positively charged Na+ and a negatively charged Chlorine CF. When current is applied, it is easily conducted by the highly charged ions. |
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