Question

Arrange the given list of acids and bases in ascending order of their pH.
Water, limewater, vinegar, gastric juices

• A. milk, vinegar, water and limewater.
• B. vinegar, water, milk and limewater.
• C. vinegar, limewater, water and milk
• D. vinegar, milk, water and limewater.

Answer 1

The correct option is D

vinegar, milk, water and limewater.

pH value of a substance tells us whether the given substance is acidic or alkaline in nature. The approximate pH value of the given substances is mentioned in the table below.
$$\begin{array}{cc}\text{Substance}& \text{pH value}\\ \text{Gastric juices}& 1\\ \text{Vinegar}& 3\\ \text{Water}& 7\\ \text{Limewater}& 11\end{array}$$
Hence, the ascending order of these substances with respect to their pH is gastric juices < vinegar < water < limewater.