Question

Write any three indicators and how they change in acidic medium? [3 MARKS]

Answer 1

Each point: 1 Mark

$\begin{array}{cc}\text{Indicator}& \text{Change in acidic medium}\\ \text{1. Blue litmus paper}& \text{Blue to red}\\ \text{2. Methyl orange}& \text{Orange to red}\\ \text{3. Phenolphthalein}& \text{Remains colourless}\end{array}$