Question

Pick the odd one out.

• A. Turmeric
• B. China rose
• C. Litmus
• D. Methyl orange

Answer 1

The correct option is D Methyl orange

Indicators are used to identify whether a given substance is acidic, basic or neutral in nature. Based on their sources, indicators can be of two types - natural and synthetic.

Natural indicators are obtained from the nature while synthetic indicators are synthesised in laboratories using chemicals.

Methyl orange is a synthetic indicator prepared in laboratories while turmeric, china rose and litmus are natural indicators obtained from turmeric plant, china rose petals and lichens respectively.