Two solutions X and Y are tested with universal indicator. Solution X turns orange whereas solution Y turns red. Which of the solutions is a stronger acid?

12 What colour will universal indicator show if you add it to the following substances?

(a) potassium hydroxide, pH = 12

(b) sodawater, pH = 5

(c) sulphuric acid, pH = 2

13 A beaker of concentrated hydrochloric acid has a pH of 1. What colour will full range universal indicator tum if it is added to this beaker? Is it a strong or a weak acid? 15 Two solutions A and B have pH values of 3.0 and 9.5 respectively. Which of these will tum litmus solution from blue to red and which will tum phenolphthalein from colourless to pink? 16 Two drinks P and Q gave acidic and alkaline reactions, respectively. One has a pH value of 9 and the other has a pH value of 3. Which drink has the pH value of 9?