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To test whether something is acidic or alkaline, we can use either a litmus paper or _______

 To test whether something is acidic or alkaline, we can use either a litmus paper or  _______

1
soda ash
2
turmeric
Correct Answer
3
sugar
4
salt

The correct answer is turmeric.

  • Turmeric is used as an indicator.
  • It is yellow in acid & neutral substance but turns bright red with bases.
  • Turmeric, litmus, china rose petals (Gudhal), etc., are some of the naturally occurring indicators.

Additional Information

  • Other indicators are:
IndicatorDescription
China RoseIt turns acidic solutions to dark pink or magenta colour and basic solutions to green colour.
Phenolphthalein

It is an organic compound of the phthalein family that is widely used as an acid-base indicator.

As indicator phenolphthalein is colourless below pH 8.5 and attains pink to deep red hue above pH 9.0.

 

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