Chemistry · Acids, Bases and Salts

Universal indicators show a variety of colors depending on the pH of the solution. Based on the data provided below, which of the following statements is/are true about substance B? Substance A | Orange | pH 4-5 | Weak acid Substance B | Navy Blue | pH 12-13 | Strong base Substance C | Greenish Yellow | pH 6-7 | Neutral Substance D | Dark Red | pH 1-2 | Strong acid Substance E | Greenish Blue | pH 8-9 | Weak base I. It is the strongest base among the given substances. II. It is used in antacids. III. It turns red litmus paper to blue. IV. None of the above.