Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 105 · 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 keeps turmeric yellow? (a) detergent water (b) baking soda water (c) soap solution (d) tamarind water
2. 2.🧺 Which of these is not needed for the turmeric test? (a) a battery cell (b) lemon juice (c) turmeric powder (d) a dropper or spoon
3. 3.🔮 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
4. 4.🧺 Which of these is not needed for the turmeric test? (a) water (b) white paper strips (c) a dropper or spoon (d) a mirror
5. 5.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) it stays white (b) green (c) reddish-brown (d) bright blue
6. 6.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the colour we see (b) the turmeric paper (c) the light we look in (d) the liquid we test
7. 7.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) a mirror (c) a balloon (d) turmeric powder
8. 8.🫧 Which of these is a base? (a) tamarind water (b) orange juice (c) soap solution (d) lemon juice
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the number of drops
10. 10.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we change it (c) we keep it the same
11. 11.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) water (d) lemon juice
13. 13.🔍 Which is the odd one out? (a) plain water (b) sugar water (c) soap solution (d) lemon juice
14. 14.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
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.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
17. 17.🧺 Which of these is not needed for the turmeric test? (a) turmeric powder (b) soap solution (c) a magnet (d) water
18. 18.🧺 Which of these is needed for the turmeric test? (a) a dropper or spoon (b) a balloon (c) a mirror (d) a battery cell
19. 19.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
20. 20.🫧 Is curd an acid, a base or neutral? (a) an acid (b) neutral (c) a base
21. 21.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) a white party dress (c) your school uniform (d) your best clothes
22. 22.📘 What do we call something that changes colour to show an acid or a base? (a) an indicator (b) a pulley (c) a magnet (d) a prism
23. 23.🔍 Which is the odd one out? (a) baking soda water (b) soap solution (c) detergent water (d) lemon juice
24. 24.True or false: a balloon is not needed for the turmeric test. (a) False (b) True
25. 25.🫧 Is orange juice an acid, a base or neutral? (a) a base (b) neutral (c) an acid
26. 26.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a dropper or spoon (d) a balloon
28. 28.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the colour we see (b) the number of drops (c) the turmeric paper (d) the light we look in
29. 29.True or false: sugar water keeps turmeric yellow. (a) False (b) True
30. 30.🫧 Which of these is neutral? (a) vinegar (b) salt water (c) detergent water (d) curd
31. 31.🧺 Do we need a dropper or spoon for the turmeric test? (a) needed (b) not needed
32. 32.True or false: detergent water turns turmeric reddish-brown. (a) True (b) False
33. 33.True or false: a mirror is not needed for the turmeric test. (a) True (b) False
34. 34.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we keep it the same (c) we change it
35. 35.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
36. 36.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
37. 37.🫧 Is plain water an acid, a base or neutral? (a) neutral (b) an acid (c) a base
38. 38.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) a comb (c) white paper strips (d) a dropper or spoon
39. 39.True or false: vinegar keeps turmeric yellow. (a) False (b) True
40. 40.🟡 Which of these turns turmeric paper reddish-brown? (a) soap solution (b) sugar water (c) vinegar (d) lemon juice

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