AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Two synthetic indicators mentioned in the chapter are phenolphthalein and methyl orange.
The chapter lists these two synthetic indicators in Table 2.1 (Activity 2.1), where they are used alongside litmus to test acids and bases. Examiners expect both names stated clearly. Litmus is also a synthetic indicator but is already implied by red/blue litmus; phenolphthalein and methyl orange are the two specifically highlighted synthetic ones.