Which of following are natural indicators?

Methyl orange

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Turmeric

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Phenolphthalein

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Red cabbage

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Solution

The correct options are
B
Turmeric

D
Red cabbage

Indicators are chemical substances used to indicate if a substance is acidic, basic or neutral.

Natural indicators are those which are obtained from natural sources like plants. Thus, turmeric and red cabbage are natural indicators.

Whereas methyl orange and phenolphthalein are synthetic indicators as they are synthesised in a laboratory using chemical substances.

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Similar questions

The indicators which turn red in acid solution are :

(a) turmeric and litmus

(b) phenolphthalein and methyl orange

(d) phenolphthalein and litmus

	Indicator	Colour change in basic medium
(1)	Litmus paper	Red to blue
(2)	Methyl orange	Orange to red
(3)	Phenolphthalein	Colourless to pink
(4)	Turmeric	Yellow to reddish brown

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