Which of the following solutions is the best conductor of electric current?

• A. 1 M CH_3COOH(aq)
• B. 1 M NaCl(aq)
• C. 1 M NH_3(aq)
• D. 1 M C_6H_{12}O_6(aq) (glucose)

Answer: (B)

Verified step by step guidance

1. Understand that the conductivity of a solution depends on the presence of ions, which carry electric current through the solution.
2. Identify which substances ionize or dissociate in water to produce ions. For example, NaCl is a strong electrolyte and dissociates completely into Na\^{+} and Cl\^{-} ions.
3. Recognize that CH_3COOH (acetic acid) is a weak acid and only partially ionizes in water, producing fewer ions compared to a strong electrolyte.
4. Note that NH_3 (ammonia) is a weak base and mostly remains as molecules in solution, producing very few ions.
5. Understand that C_6H_{12}O_6 (glucose) is a molecular compound that does not ionize in water and therefore does not conduct electricity well.