Question

Which of the following basic solutions will have the highest pH?
A. Lemon Juice
B. HCl
C. Vinegar
D. NaOH

Answer 1

Hint: The solutions which have less pH are called acidic solutions and the solutions which have high pH are called basic solutions. The reason behind the less and high pH in the solutions is due to the presence of the respective ${{H}^{+}}$ and $O{{H}^{-}}$ ions.

Complete answer:
- In the question it is asked to find the basic solution which have high pH among the given options
- We know that the pH of an acidic solution is less, and the pH of the basic solution will be high.
- Coming to the given options, Options A, Lemon juice.
- The chemical which is present in lemon juice is ascorbic acid.
- We know that ascorbic acid is acidic in nature and the lemon juice is going to have less pH due to the presence of ascorbic acid.
- So, option A is incorrect.
- Coming to option B, HCl. We already know that HCl means hydrochloric acid.
- The hydrochloric acid is highly acidic in nature and contains less pH.
- So, option B is incorrect.
- Coming to option C, vinegar.
- Diluted acetic acid is called vinegar.
- The acetic acid is a weak acid and contains a pH value of less than 7.
- So, option C is also incorrect.
- Coming to option D, NaOH.
- Sodium hydroxide is going to release $O{{H}^{-}}$ ions when it is dissolved in water.
- Due to the release of $O{{H}^{-}}$ ions in water the pH of the NaOH solution will be high.
- Therefore, the chemical among the given options which have high pH is NaOH.

So, the correct option is D.

Note:
The solution which has a pH less than 7 then the solution is called acidic solution and the solution which has a pH of greater than 7 then the solution is called basic solution. The solution which has a pH of 7, then the solution is called neutral solution.