Question

Which of the following acids is a strong electrolyte?

• A. $HCl$
• B. $HBr$
• C. $HI$
• D. All of the above

Answer 1

Answer: (D)

All of the above

$HCl$ when dissolved in water, completely dissociates in water to give the ions $H^{+}$ and $C{l}^{-}$.
$HBr$ when dissolved in water, completely dissociates in water to give the ions $H^{+}$ an d $B{r}^{-}$.
Similarly, $HI$ when dissolved in water, completely dissociates into the ions $H^{+}$ and $I^{-}$.
Thus all the acids mentioned above undergo complete dissociation into ions when dissolved in water. Hence these acids are strong electrolytes.