Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 382 · 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.⚖️ 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 measure it (c) we change it
2. 2.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns yellow again (c) it turns darker red (d) it disappears
3. 3.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) salt water (d) vinegar
4. 4.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
5. 5.🧺 Which of these is not needed for the turmeric test? (a) lemon juice (b) turmeric powder (c) water (d) a mirror
6. 6.🫧 Which of these is neutral? (a) tamarind water (b) vinegar (c) lemon juice (d) plain water
7. 7.🫧 Which of these is a base? (a) baking soda water (b) sugar water (c) plain water (d) vinegar
8. 8.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
9. 9.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it stays yellow (d) it turns blue
10. 10.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it stays yellow (b) it turns blue (c) reddish-brown (d) it turns green
11. 11.True or false: salt water keeps turmeric yellow. (a) True (b) False
12. 12.🫧 Which of these is an acid? (a) baking soda water (b) orange juice (c) detergent water (d) salt water
13. 13.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) vinegar
14. 14.🔍 Which is the odd one out? (a) soap solution (b) lemon juice (c) salt water (d) plain water
15. 15.🫧 Which of these is a base? (a) salt water (b) tamarind water (c) soap solution (d) sugar water
16. 16.True or false: a balloon is needed for the turmeric test. (a) False (b) True
17. 17.🟡 Turmeric paper meets vinegar. What happens? (a) stays yellow (b) turns reddish-brown
18. 18.🧺 Which of these is needed for the turmeric test? (a) white paper strips (b) a balloon (c) yeast (d) a magnet
19. 19.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
20. 20.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) sniff each bottle hard (c) use only kitchen items (d) mix bathroom cleaners
21. 21.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a balloon (c) a dropper or spoon (d) lemon juice
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the liquid we test (d) the colour we see
23. 23.True or false: soap solution keeps turmeric yellow. (a) False (b) True
24. 24.True or false: a comb is needed for the turmeric test. (a) True (b) False
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) plain water (c) salt water (d) baking soda water
26. 26.🫧 Which of these is a base? (a) plain water (b) tamarind water (c) detergent water (d) lemon juice
27. 27.🟡 Which of these keeps turmeric yellow? (a) plain water (b) detergent water (c) baking soda water (d) soap solution
28. 28.🔍 Which is the odd one out? (a) tamarind water (b) detergent water (c) soap solution (d) baking soda water
29. 29.🧺 Which of these is needed for the turmeric test? (a) a balloon (b) lemon juice (c) a battery cell (d) yeast
30. 30.⚖️ 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 measure it (c) we change it
31. 31.🫧 Is sugar water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
32. 32.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
33. 33.True or false: lemon juice is an acid. (a) True (b) False
34. 34.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
35. 35.⚖️ 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 turmeric paper
36. 36.🫧 Is curd an acid, a base or neutral? (a) neutral (b) an acid (c) a base
37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we change it (b) we keep it the same (c) we measure it
38. 38.True or false: curd is a base. (a) False (b) True
39. 39.True or false: soap solution is a base. (a) False (b) True
40. 40.🟡 Why does soap solution change turmeric’s colour? (a) soap is hot (b) soap is magnetic (c) soap water is a base (d) soap is an acid

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