Conductivity of Liquids

Different liquids have different levels of conductivity, which determines their ability to conduct electricity. Conductivity is a measure of how well a substance allows the flow of electric current through it. In this case, the question is asking which of the given liquids is a good conductor of electricity.

Distilled Water (c)

Distilled water is not a good conductor of electricity. It is a poor conductor because it does not contain any dissolved ions or impurities that can carry an electric current. Distilled water is essentially pure water that has undergone a process to remove any impurities, including dissolved salts and minerals. Therefore, it lacks the ions necessary for the conduction of electricity.

Alcohol (b)

Alcohol, such as ethanol or isopropyl alcohol, is also a poor conductor of electricity. Like distilled water, alcohol does not contain significant amounts of dissolved ions. Therefore, it does not provide a pathway for electric current to flow.

Sugar Solution (a)

A sugar solution is also a poor conductor of electricity. Although sugar is soluble in water, it does not dissociate into ions when dissolved. As a result, a sugar solution does not have enough ions to facilitate the flow of electric current.

Sea Water (d)

Sea water is a good conductor of electricity. It contains various dissolved salts, such as sodium chloride, magnesium chloride, and calcium chloride. These salts dissociate into ions when dissolved in water, creating a solution that can conduct electricity. The presence of ions allows electric current to flow through sea water.

Conclusion

Among the liquids listed, only sea water (option d) is a good conductor of electricity. It contains dissolved ions that enable the flow of electric current. Distilled water, alcohol, and sugar solutions lack the necessary ions and are poor conductors of electricity.