Q117 / 200 · MHT CET - Medical 2026 (24 April Shift 1) · Chemistry
Which of the following aqueous solutions of salts is neutral?
- A$\text{NH}_4\text{NO}_3$
- B$\text{KCN}$
- Correct answerC$\text{KNO}_3$
- D$\text{CuCl}_2$
Solution
$\text{NH}_4\text{NO}_3$ is a salt of a weak base ($\text{NH}_4\text{OH}$) and a strong acid ($\text{HNO}_3$). Its aqueous solution is acidic.
$\text{KCN}$ is a salt of a strong base ($\text{KOH}$) and a weak acid ($\text{HCN}$). Its aqueous solution is basic.
$\text{KNO}_3$ is a salt of a strong base ($\text{KOH}$) and a strong acid ($\text{HNO}_3$). Its aqueous solution is neutral.
$\text{CuCl}_2$ is a salt of a weak base ($\text{Cu(OH)}_2$) and a strong acid ($\text{HCl}$). Its aqueous solution is acidic.
Answer: $\text{KNO}_3$
$\text{KCN}$ is a salt of a strong base ($\text{KOH}$) and a weak acid ($\text{HCN}$). Its aqueous solution is basic.
$\text{KNO}_3$ is a salt of a strong base ($\text{KOH}$) and a strong acid ($\text{HNO}_3$). Its aqueous solution is neutral.
$\text{CuCl}_2$ is a salt of a weak base ($\text{Cu(OH)}_2$) and a strong acid ($\text{HCl}$). Its aqueous solution is acidic.
Answer: $\text{KNO}_3$
Hence, the correct answer is option: 'C'.