Phenolphthalein is a colourless indicator that turns pink in basic solution.

False

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True

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Solution

The correct option is B True

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Similar questions

Q. In acidic solution, phenolphthalein gives a pink colour. The basic solution containing phenolphthalein is colourless.

Question 4

Phenolphthalein is a synthetic indicator and its colours in acidic and basic solutions, respectively are
(a) red and blue.
(b) blue and red.
(c) pink and colourless.
(d) colourless and pink

Name an indicator which is pink in alkaline solution but turns colourless in acidic solution.

Q. Phenolphthalein indicator is colourless in an acid and turns pink in an alkaline solution. When an aqueous solution of potassium iodide is electrolysed with phenolphthale in indicator, what colours appear at the electrodes?
Cathode:

2 H_{2} O_{(l)} + 2 e^{-} \to H_{(g)} + 2 O H^{-} (a q)

Anode:

2 I_{(a q)}^{-} \to I_{2 (s)} + 2 e^{-}

Q. Acid + Base → Turns phenolphthalein pink
More has to be added to make the resulting solution colourless.

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