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Take two pieces of yellow colour cloth and two bowl of solution & label both clothes and bowl as A and B

Then put 2 drops of solution from bowl A on cloth A and put 2 drops of solution from bowl B on cloth B

Cloth A become red colour whereas cloth B remains yellow colour

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Student notices

Allow students to ask questions so that the answers to which they think help them to answer

Students might ask questions like “what does the two solutions contain?” Are the two solutions different?”

I will not answer their question but I will show them by putting two drops of solution from bowl B on cloth A and bowl A on cloth B but still cloth A becomes red & cloth B remains yellow colour.

Then they will think that solutions are not different but the 2 clothes are different

Then they might ask clothes to see. And they will observe that one cloth is Smelling like turmeric whereas other is not

Then I will also allow them to look the two solutions in bowl

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After looking solutions in 2 bowls they findout that the solutions are soap water

From this they found that When soap is mixed with turmeric it gives red colour

Then teacher explain them about natural indicator and base

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