Q17 / 150 · MHT CET 2026 (13 April Shift 1) · Chemistry
Which of the following sentences is true for a basic solution?
- AFor basic solution, $[\text{H}_3\text{O}^+] = [\text{OH}^-]$
- Correct answerBIn basic solution, the excess of $\text{OH}^-$ ions are present.
- CIn the basic solution, there is excess of $\text{H}_3\text{O}^+$ ions.
- DThe pOH of a basic solution can be calculated by pOH = $-\log[\text{H}^+]$
Solution
In a neutral solution, $[\text{H}_3\text{O}^+] = [\text{OH}^-]$.
In an acidic solution, $[\text{H}_3\text{O}^+] > [\text{OH}^-]$, meaning there is an excess of $\text{H}_3\text{O}^+$ ions.
In a basic solution, $[\text{OH}^-] > [\text{H}_3\text{O}^+]$, meaning there is an excess of $\text{OH}^-$ ions.
The pOH of any solution is defined as $\text{pOH} = -\log[\text{OH}^-]$.
Thus, the only true statement is that in a basic solution, an excess of $\text{OH}^-$ ions are present.
Answer: In basic solution, the excess of $\text{OH}^-$ ions are present.
In an acidic solution, $[\text{H}_3\text{O}^+] > [\text{OH}^-]$, meaning there is an excess of $\text{H}_3\text{O}^+$ ions.
In a basic solution, $[\text{OH}^-] > [\text{H}_3\text{O}^+]$, meaning there is an excess of $\text{OH}^-$ ions.
The pOH of any solution is defined as $\text{pOH} = -\log[\text{OH}^-]$.
Thus, the only true statement is that in a basic solution, an excess of $\text{OH}^-$ ions are present.
Answer: In basic solution, the excess of $\text{OH}^-$ ions are present.
Hence, the correct answer is option: 'B'.