GCE O/L Science Tricks | Grade 10/11 PDF

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Science Tricks

Litmus turns red in acidic solutions and blue in alkaline solutions and is that the oldest and most ordinarily used indicator of whether a substance is an acid or a base.


Phenolphthalein, (C20H14O4), an compound of the phthalein family that’s widely employed as an indicator . As an indicator of a solution’s pH, phenolphthalein is colourless below pH 8.5 and attains a pink to crimson hue above pH 9.0


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Responses (44)

  1. I found this really insightful. It’s refreshing how broader concepts like the ones discussed here also show up in personal care routines. Taking care of your hair, being mindful about grooming, improving skincare, and maintaining a good shaving routine all contribute to overall beauty. Even a simple salon visit for a fresh haircut can improve how you feel day to day.

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