Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 930 · 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.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
2. 2.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) detergent water (b) tamarind water (c) plain water (d) salt water
4. 4.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) yeast (c) a dropper or spoon (d) soap solution
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
6. 6.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
7. 7.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) baking soda water (c) detergent water (d) soap solution
8. 8.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
9. 9.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) bright blue (d) reddish-brown
10. 10.⚖️ 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
11. 11.🧺 Do we need lemon juice for the turmeric test? (a) not needed (b) needed
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a dropper or spoon (b) white paper strips (c) soap solution (d) a mirror
13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the number of drops (b) the light we look in (c) the turmeric paper (d) the liquid we test
15. 15.True or false: vinegar is a base. (a) True (b) False
16. 16.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) soap solution (d) salt water
17. 17.🫧 Which of these is a base? (a) orange juice (b) curd (c) vinegar (d) soap solution
18. 18.True or false: curd is a base. (a) False (b) True
19. 19.True or false: vinegar keeps turmeric yellow. (a) False (b) True
20. 20.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
21. 21.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) a dropper or spoon (c) a mirror (d) turmeric powder
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we keep it the same (c) we measure it
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the liquid we test (b) the colour we see (c) the number of drops
27. 27.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the turmeric paper (b) the colour we see (c) the liquid we test
28. 28.True or false: sugar water is a base. (a) False (b) True
29. 29.True or false: soap solution is needed for the turmeric test. (a) False (b) True
30. 30.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
31. 31.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) plain water
32. 32.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
33. 33.🛟 Turmeric stains clothes. What should you wear? (a) your school uniform (b) a white party dress (c) an old shirt or apron (d) your best clothes
34. 34.🫧 Which of these is neutral? (a) orange juice (b) soap solution (c) lemon juice (d) plain water
35. 35.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) neutral (c) a base
36. 36.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
37. 37.True or false: water is not needed for the turmeric test. (a) True (b) False
38. 38.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
39. 39.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
40. 40.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test

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