In a Demonstration of Strong Electrolytes, Weak Electrolytes, and Nonelectrolytes

Multiple Choice

In a demonstration of strong electrolytes, weak electrolytes, and nonelectrolytes, Professor Popsnorkle used a lightbulb apparatus that showed how much a solution conducted electricity by the brightness of the lightbulb. When pure water was tested, the bulb did not light. Then Professor Popsnorkle tested the following aqueous solutions. Which one caused the bulb to burn dimly but not brightly?

A) table salt, NaCl
B) ethanol, CH₃CH₂OH
C) table sugar, C₁₂H₂₂O₁₁
D) acetic acid, CH₃COOH
E) methanol, CH₃OH