Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 990 · 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 rule keeps the turmeric test safe? (a) sniff each bottle hard (b) sip each liquid (c) use only kitchen items (d) mix bathroom cleaners
2. 2.🫧 Is lemon juice an acid, a base or neutral? (a) neutral (b) a base (c) an acid
3. 3.True or false: turmeric powder is not needed for the turmeric test. (a) True (b) False
4. 4.🟡 Turmeric paper meets sugar water. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.True or false: curd is neutral. (a) False (b) True
6. 6.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) soap solution (d) sugar water
7. 7.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) your school uniform (c) a white party dress (d) an old shirt or apron
8. 8.🫧 Which of these is a base? (a) sugar water (b) curd (c) baking soda water (d) orange juice
9. 9.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) tamarind water (c) detergent water (d) soap solution
10. 10.🔍 Which is the odd one out? (a) detergent water (b) plain water (c) vinegar (d) salt water
11. 11.True or false: lemon juice is not needed for the turmeric test. (a) True (b) False
12. 12.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) a dropper or spoon (c) yeast (d) soap solution
13. 13.🧺 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
14. 14.🫧 Which of these is an acid? (a) tamarind water (b) plain water (c) soap solution (d) baking soda water
15. 15.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) baking soda water (c) lemon juice (d) vinegar
16. 16.🫧 Which of these is a base? (a) vinegar (b) detergent water (c) lemon juice (d) salt water
17. 17.🟡 Turmeric paper meets lemon juice. What happens? (a) stays yellow (b) turns reddish-brown
18. 18.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) soap solution (c) a dropper or spoon (d) a balloon
20. 20.True or false: baking soda water is an acid. (a) True (b) False
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) yeast (b) water (c) a dropper or spoon (d) white paper strips
22. 22.True or false: detergent water is a base. (a) False (b) True
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the colour we see (d) the number of drops
24. 24.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns blue (c) it turns darker red (d) it turns yellow again
25. 25.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a mirror (c) white paper strips (d) a dropper or spoon
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 turmeric paper (c) the colour we see
27. 27.True or false: detergent water keeps turmeric yellow. (a) False (b) True
28. 28.True or false: a battery cell is needed for the turmeric test. (a) True (b) False
29. 29.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns red (b) it turns blue (c) it stays yellow (d) it turns black
30. 30.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) green (c) bright blue (d) it stays white
31. 31.🫧 Which of these is neutral? (a) lemon juice (b) orange juice (c) soap solution (d) plain water
32. 32.True or false: tamarind water is neutral. (a) True (b) False
33. 33.True or false: water is not needed for the turmeric test. (a) False (b) True
34. 34.True or false: a battery cell is not needed for the turmeric test. (a) True (b) False
35. 35.True or false: a comb is not needed for the turmeric test. (a) False (b) True
36. 36.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) green (c) bright blue (d) reddish
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 measure it (c) we keep it the same
38. 38.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) lemon juice (c) vinegar (d) soap solution
39. 39.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) a magnet (c) a comb (d) a dropper or spoon
40. 40.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap water is a base (c) soap is magnetic (d) soap is an acid

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