Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 690 · 40 questions

What you do (Yellow or red?): 1. Mix turmeric powder with a little water into a paste and paint it on white paper strips; let them dry. 2. Put a drop of soap solution on one strip and a drop of lemon juice on another. 3. Write down the colour each drop makes. 4. Add lemon juice to the reddish spot and watch it change back.

1. 1.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) white paper strips (d) turmeric powder
2. 2.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) detergent water (c) plain water (d) vinegar
3. 3.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
4. 4.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a battery cell (c) yeast (d) a comb
5. 5.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap is hot (d) soap water is a base
6. 6.🟡 Turmeric paper meets tamarind water. What happens? (a) stays yellow (b) turns reddish-brown
7. 7.True or false: baking soda water is a base. (a) True (b) False
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we measure it (b) we change it (c) we keep it the same
9. 9.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a mirror (c) lemon juice (d) a dropper or spoon
10. 10.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) a balloon (c) white paper strips (d) turmeric powder
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) True (b) False
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) soap solution (d) a magnet
13. 13.🫧 Which of these is neutral? (a) baking soda water (b) lemon juice (c) tamarind water (d) plain water
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
15. 15.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a mirror (c) a comb (d) a balloon
16. 16.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
17. 17.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your best clothes (d) your school uniform
18. 18.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) a dropper or spoon (c) soap solution (d) a comb
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is the one thing we change. (a) False (b) True
20. 20.🫧 Is vinegar an acid, a base or neutral? (a) an acid (b) neutral (c) a base
21. 21.🔍 Which is the odd one out? (a) sugar water (b) soap solution (c) vinegar (d) tamarind water
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a mirror (b) white paper strips (c) soap solution (d) a dropper or spoon
23. 23.🔍 Which is the odd one out? (a) lemon juice (b) vinegar (c) sugar water (d) baking soda water
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
25. 25.🔍 Which is the odd one out? (a) baking soda water (b) sugar water (c) detergent water (d) soap solution
26. 26.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns green (b) reddish-brown (c) it stays yellow (d) it turns blue
27. 27.🫧 Is sugar water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
28. 28.True or false: soap solution keeps turmeric yellow. (a) False (b) True
29. 29.True or false: curd is an acid. (a) False (b) True
30. 30.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we keep it the same (b) we change it (c) we measure it
31. 31.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a comb (c) lemon juice (d) a balloon
32. 32.🫧 Which of these is an acid? (a) detergent water (b) baking soda water (c) salt water (d) tamarind water
33. 33.🫧 Which of these is a base? (a) curd (b) plain water (c) vinegar (d) baking soda water
34. 34.🟡 Which of these keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) plain water
35. 35.True or false: a dropper or spoon is not needed for the turmeric test. (a) True (b) False
36. 36.True or false: curd is neutral. (a) True (b) False
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) detergent water (d) curd
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
40. 40.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish

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