MEDIUM
7th CBSE
IMPORTANT
Earn 100

Make a natural indicator from China rose petals.
Materials: China rose petal, boiling water
Let's do: 1. Take some petals of China rose (Gudhal) in a beaker and add boiling water to this.
2. Keep the mixture undisturbed for some time till the water becomes coloured. This coloured water can
now be used as an indicator.
3. Put different solutions with China rose extract indicator. Record your observations.
Observations:
S.No
Solution
Effect on China rose extract
Inference
1
Milk
2
Lemon juice
3
Soap solution
4
Tomato juice
5
Tamarind juice
2. Keep the mixture undisturbed for some time till the water becomes coloured. This coloured water can
now be used as an indicator.
3. Put different solutions with China rose extract indicator. Record your observations.

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