Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 700 · 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.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) lemon juice (c) vinegar (d) sugar water
2. 2.🫧 Which of these is a base? (a) baking soda water (b) sugar water (c) vinegar (d) curd
3. 3.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) turmeric powder (c) a mirror (d) soap solution
4. 4.True or false: orange juice is a base. (a) False (b) True
5. 5.True or false: baking soda water is a base. (a) True (b) False
6. 6.🫧 Is orange juice an acid, a base or neutral? (a) neutral (b) an acid (c) a base
7. 7.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
8. 8.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the turmeric paper is the one thing we change. (a) False (b) True
10. 10.True or false: a dropper or spoon is needed for the turmeric test. (a) True (b) False
11. 11.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is hot (d) soap is an acid
12. 12.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the turmeric paper (b) the liquid we test (c) the colour we see (d) the number of drops
13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we keep it the same (b) we change it (c) we measure it
14. 14.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a comb (c) a balloon (d) a mirror
15. 15.⚖️ 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
16. 16.🫧 Which of these is neutral? (a) soap solution (b) salt water (c) orange juice (d) baking soda water
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
18. 18.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) salt water (c) soap solution (d) detergent water
19. 19.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) bright blue (c) green (d) reddish
20. 20.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) a dropper or spoon (c) a comb (d) lemon juice
21. 21.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) vinegar (c) plain water (d) sugar water
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) a magnet (c) water (d) soap solution
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we change it (c) we measure it
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is the one thing we change. (a) True (b) False
25. 25.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) use only kitchen items (c) sniff each bottle hard (d) sip each liquid
26. 26.🧺 Do we need a comb for the turmeric test? (a) needed (b) not needed
27. 27.🟡 Turmeric paper meets detergent water. What happens? (a) turns reddish-brown (b) stays yellow
28. 28.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
29. 29.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
30. 30.🔍 Which is the odd one out? (a) plain water (b) soap solution (c) vinegar (d) sugar water
31. 31.⚖️ 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 change it (c) we measure it
32. 32.True or false: a battery cell is not needed for the turmeric test. (a) False (b) True
33. 33.True or false: plain water keeps turmeric yellow. (a) True (b) False
34. 34.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
35. 35.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) orange juice (d) sugar water
36. 36.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is the one thing we change. (a) True (b) False
38. 38.🫧 Which of these is a base? (a) detergent water (b) vinegar (c) curd (d) tamarind water
39. 39.True or false: lemon juice is needed for the turmeric test. (a) True (b) False
40. 40.🫧 Which of these is neutral? (a) baking soda water (b) tamarind water (c) soap solution (d) plain water

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