Question 24 of 28beginner🧠 RememberVery Short1 mark
What change will you observe if you test soap with litmus paper (red and blue)?
Correct Answer
Soap solution is basic in nature. Red litmus paper turns blue, and blue litmus paper remains unchanged.
Exercise: EXERCISES | Q: 11 | (Page 20)
For More Understanding
Explanation
The context states that soap molecules are sodium or potassium salts of long-chain carboxylic acids. Being salts of a strong base (NaOH/KOH) and a weak acid (carboxylic acid), soap solutions are basic in nature. Basic solutions turn red litmus paper blue and have no effect on blue litmus paper.