Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 867 · 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 is neutral? (a) detergent water (b) baking soda water (c) salt water (d) soap solution
2. 2.🫧 Is sugar water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) vinegar (c) tamarind water (d) soap solution
4. 4.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the colour we see is kept the same. (a) False (b) True
5. 5.True or false: tamarind water keeps turmeric yellow. (a) False (b) True
6. 6.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) water (c) a battery cell (d) soap solution
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) a dropper or spoon (c) soap solution (d) water
8. 8.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) True (b) False
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the liquid we test (b) the number of drops (c) the light we look in (d) the colour we see
10. 10.True or false: soap solution is needed for the turmeric test. (a) True (b) False
11. 11.🫧 Which of these is an acid? (a) soap solution (b) curd (c) plain water (d) baking soda water
12. 12.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a magnet (c) a dropper or spoon (d) turmeric powder
13. 13.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) white at once (b) reddish (c) green (d) bright blue
14. 14.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) detergent water (d) plain water
15. 15.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is what we measure. (a) False (b) True
17. 17.🧺 Do we need a mirror for the turmeric test? (a) needed (b) not needed
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) False (b) True
19. 19.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) lemon juice (b) soap solution (c) water (d) a balloon
20. 20.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) lemon juice
21. 21.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) white paper strips (d) a comb
22. 22.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
23. 23.🫧 Which of these is neutral? (a) curd (b) baking soda water (c) sugar water (d) lemon juice
24. 24.🟡 Turmeric paper meets salt water. What happens? (a) turns reddish-brown (b) stays yellow
25. 25.🟡 Which of these turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) lemon juice (d) vinegar
26. 26.🧺 Which of these is needed for the turmeric test? (a) turmeric powder (b) a battery cell (c) a comb (d) a mirror
27. 27.🔍 Which is the odd one out? (a) plain water (b) lemon juice (c) soap solution (d) salt water
28. 28.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) use only kitchen items (d) sip each liquid
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we change it (c) we keep it the same
30. 30.True or false: lemon juice turns turmeric reddish-brown. (a) False (b) True
31. 31.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) reddish-brown (c) it stays yellow (d) it turns green
32. 32.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
33. 33.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
34. 34.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) soap solution (d) yeast
35. 35.True or false: plain water keeps turmeric yellow. (a) False (b) True
36. 36.True or false: lemon juice is needed for the turmeric test. (a) False (b) True
37. 37.True or false: detergent water is a base. (a) True (b) False
38. 38.🫧 Which of these is an acid? (a) baking soda water (b) soap solution (c) orange juice (d) plain water
39. 39.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
40. 40.🔍 Which is the odd one out? (a) detergent water (b) lemon juice (c) vinegar (d) tamarind water

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