Which indicator is colourless in acidic medium and turns pink in basic medium ?

Litmus
Methyl Orange
Phenolphthalein
Dilute HCl

LohaHridoy

4 views

2025-01-04 04:42

1 Answers

AhmedNazir

Option 3 : Phenolphthalein

The colour of different pH indicators in different mediums is summarized in the table below:

Indicator	Neutral colour	Colour in acidic medium	Colour in basic medium
Litmus paper	Blue/red	Blue to red	Red to blue
Phenolphthalein	colourless	colourless	pink
Methyl Orange	orange	red	yellow

From the table, phenolphthalein is colourless in acidic medium and turns pink in basic medium.

4 views Answered 2022-09-04 04:29

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