A. Acid is strong
B. Acid is weak
C. Bade is strong
D. Acid is strong base is weak
| Indicator | Usage | Color in Acidic Solution | Color in Basic Solution | Color in Neutral Solution |
| Phenolphthalein | When Base is Strong | Colorless | Pink | Colorless |
| Methyl Orange | When Acid is Strong | Red | Yellow | Orange |
| Litmus | Acid-Base Titration | Red | Blue | Purple |
| Universal Indicator | General pH Measurement | Red | Orange/Yellow | Green |
Submitted by :- Jamil Ahmed