Q10 / 150 · MHT CET 2026 (19 April Shift 2) · Chemistry
Which of the following equimolar solutions is the best conductor of electricity at same temperature ?
- A$\text{CH}_3\text{COOH}$
- B$\text{NH}_4\text{OH}$
- Correct answerC$\text{HCl}$
- D$\text{C}_6\text{H}_{12}\text{O}_6$
Solution
Electrical conductivity of an aqueous solution depends on the number of ions present and their ionic mobility.
$\text{HCl}$ is a strong electrolyte and dissociates completely in water to give $\text{H}^+$ and $\text{Cl}^-$ ions.
$\text{CH}_3\text{COOH}$ and $\text{NH}_4\text{OH}$ are weak electrolytes and dissociate only partially, producing fewer ions.
$\text{C}_6\text{H}_{12}\text{O}_6$ (glucose) is a non-electrolyte and does not dissociate into ions.
Furthermore, the $\text{H}^+$ ion has exceptionally high ionic mobility in water.
Thus, the equimolar solution of $\text{HCl}$ has the highest concentration of highly mobile ions, making it the best conductor of electricity.
$\text{HCl}$ is a strong electrolyte and dissociates completely in water to give $\text{H}^+$ and $\text{Cl}^-$ ions.
$\text{CH}_3\text{COOH}$ and $\text{NH}_4\text{OH}$ are weak electrolytes and dissociate only partially, producing fewer ions.
$\text{C}_6\text{H}_{12}\text{O}_6$ (glucose) is a non-electrolyte and does not dissociate into ions.
Furthermore, the $\text{H}^+$ ion has exceptionally high ionic mobility in water.
Thus, the equimolar solution of $\text{HCl}$ has the highest concentration of highly mobile ions, making it the best conductor of electricity.
Hence, the correct answer is option: 'C'.