Question

Which of the following has maximum conductivity?
A. Purified drinking water
B. Distilled water
C. Rainwater
D. River water

Answer 1

Hint: The conductivity of an answer depends on the impurities, ions, minerals, etc. present in it. For conducting the electrical currents, charged bodies or electrons are required which don't seem to be present in purified or neutral solution or pure water. Conductivity increases because the number of charged bodies increases.

Complete answer:
Purified water is free from impurities and pollutants like microbes. It contains minerals but the number isn't so significant.Distilled water is purified water obtained after repeated boiling and condensation. It doesn't have any sort of ion or impurity, and the mineral level is additionally very low.

Rainwater again comes from evaporation, it contains minerals and pollutants present within the air like ions, oxides, or dirt particles. River water contains all minerals and ionic species, thus it's the simplest conductivity among all given options.

Hence, the right option is D.

Note: Conductivity may be a measure of the flexibility of water to pass current. The electrical conductivity in water is suffering from inorganic dissolved solids, like chloride, nitrate, sulfate, and phosphate anions (negatively charged ions) or sodium, magnesium, calcium, iron, and aluminum cations (positively charged ions). Organic compounds like oil, phenol, alcohol, and sugar don’t conduct electricity well, therefore the conductivity in water is incredibly low. Conductivity is additionally plagued by temperature.