What would you expect the pH of pure water to be? (b) What colour would the universal indicator show in an aqueous solution of sugar? Why? c) A sample of rain water turned universal indicator paper yellow. What would you expect its pH to be? Is it a strong or a weak acid?
ChemistryClass 10ICSEAnswered 27 Mar 2026
Answer
- The pH of pure water is 7 as it is neutral substance
- A universal indicator shows a green colour in an aqueous solution of Aqueous solution of sugar is neutral and will have pH of 7
- Universal indicator shows a greenish yellow colour at pH 6 and Orange yellow at pH Here if the sample of rain water turned into yellow indicates the pH should lies in between these two values and considered to be a weak acid