Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 780 · 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 is the odd one out? (a) vinegar (b) tamarind water (c) lemon juice (d) baking soda water
2. 2.🫧 Which of these is a base? (a) baking soda water (b) lemon juice (c) salt water (d) vinegar
3. 3.🟡 Why does soap solution change turmeric’s colour? (a) soap is an acid (b) soap is magnetic (c) soap water is a base (d) soap is hot
4. 4.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
5. 5.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
6. 6.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns blue (c) it turns black (d) it stays yellow
7. 7.🔍 Which is the odd one out? (a) plain water (b) vinegar (c) soap solution (d) sugar water
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
9. 9.🧺 Which of these is not needed for the turmeric test? (a) water (b) soap solution (c) yeast (d) turmeric powder
10. 10.True or false: water is needed for the turmeric test. (a) False (b) True
11. 11.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a magnet (c) a comb (d) a balloon
12. 12.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) detergent water (c) baking soda water (d) vinegar
13. 13.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) plain water (c) lemon juice (d) salt water
15. 15.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) orange juice (d) baking soda water
16. 16.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
17. 17.🧺 Do we need turmeric powder for the turmeric test? (a) not needed (b) needed
18. 18.⚖️ 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
19. 19.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
20. 20.🫧 Which of these is a base? (a) curd (b) soap solution (c) lemon juice (d) tamarind water
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) a dropper or spoon (c) lemon juice (d) water
22. 22.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) baking soda water (d) curd
23. 23.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) salt water
24. 24.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns blue (c) it turns yellow again (d) it disappears
25. 25.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it stays yellow (c) it turns black (d) it turns blue
26. 26.🛟 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
27. 27.True or false: baking soda water keeps turmeric yellow. (a) True (b) False
28. 28.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) white at once (c) bright blue (d) reddish
29. 29.🧺 Which of these is not needed for the turmeric test? (a) water (b) a battery cell (c) turmeric powder (d) soap solution
30. 30.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) turmeric powder (c) a balloon (d) lemon juice
31. 31.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
32. 32.🧺 Do we need a battery cell for the turmeric test? (a) needed (b) not needed
33. 33.🟡 Turmeric paper meets tamarind water. What happens? (a) turns reddish-brown (b) stays yellow
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) soap solution (d) a mirror
35. 35.🫧 Which of these is neutral? (a) curd (b) sugar water (c) lemon juice (d) vinegar
36. 36.True or false: plain water is neutral. (a) True (b) False
37. 37.🔍 Which is the odd one out? (a) salt water (b) vinegar (c) detergent water (d) plain water
38. 38.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
39. 39.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) a base (c) an acid
40. 40.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed

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