Question

Choose the examples of a synthetic indicator.

• A. Methyl orange
• B. Red cabbage
• C. Methyl red
• D. Phenolpthalein

Answer 1

Answer: (A), (C), (D)

The correct options are
A Methyl orange
C Methyl red
D Phenolpthalein

Indicators prepared from natural substances are called natural indicators. Indicators prepared by artificial means are called synthetic indicators. The table given below gives the list of few natural and synthetic indicators. $$\begin{array}{cc}\text{Natural indicators}& \text{Synthetic indicators}\\ \text{Turmeric}& \text{Methyl orange}\\ \text{China rose}& \text{Phenolpthalein}\\ \text{Red cabbage}& \text{Methyl red}\end{array}$$ From the table and given options, we can conclude that red cabbage is a natural indicator and remaining options are examples of a synthetic indicator.