Question

Phenolphthalein is .......
(a) the natural indicator
(b) the synthetic indicator
(C) an olfactory indicator
(d) the universal indicator​

Answer 1

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Phenolphthalein is

(a) the natural indicator

(b) the synthetic indicator✔✔

(C) an olfactory indicator

(d) the universal indicator

Answer 2

Answer :

Phenolphthalein is the universal indicator.

More about it :

formula C₂₀H₁₄O₄

It is colourless.