defence exam Army Havildar SAC Mock Test Series 2025 General Science Chemistry Acids, Bases and Salts
If a substance has a pH of 11, which of the following statements is true?
1
It is neutral and does not change the litmus colour.
2
It is acidic and does not change the colour of the litmus paper.
3
It is basic and can turn red litmus paper blue.
4
It is acidic and can turn blue litmus paper red.