Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 726 · 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.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
2. 2.True or false: water is needed for the turmeric test. (a) True (b) False
3. 3.🟡 Which of these turns turmeric reddish-brown? (a) lemon juice (b) sugar water (c) soap solution (d) tamarind water
4. 4.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) water (c) a battery cell (d) lemon juice
5. 5.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we measure it (c) we keep it the same
6. 6.🫧 Which of these is a base? (a) plain water (b) tamarind water (c) baking soda water (d) lemon juice
7. 7.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) a balloon (d) white paper strips
8. 8.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) white paper strips (b) lemon juice (c) turmeric powder (d) a magnet
9. 9.🔮 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
10. 10.True or false: soap solution is not needed for the turmeric test. (a) True (b) False
11. 11.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we measure it (b) we change it (c) we keep it the same
12. 12.🔍 Which is the odd one out? (a) soap solution (b) baking soda water (c) salt water (d) detergent water
13. 13.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
14. 14.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the turmeric paper (c) the light we look in (d) the colour we see
15. 15.🟡 Which of these keeps turmeric yellow? (a) tamarind water (b) soap solution (c) detergent water (d) baking soda water
16. 16.True or false: water is not needed for the turmeric test. (a) False (b) True
17. 17.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the light we look in (c) the liquid we test
18. 18.🫧 Which of these is an acid? (a) baking soda water (b) sugar water (c) curd (d) soap solution
19. 19.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) yeast (c) lemon juice (d) soap solution
20. 20.True or false: a mirror is needed for the turmeric test. (a) True (b) False
21. 21.True or false: vinegar keeps turmeric yellow. (a) False (b) True
22. 22.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we change it (b) we measure it (c) we keep it the same
23. 23.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we measure it (b) we keep it the same (c) we change it
24. 24.🧺 Do we need white paper strips for the turmeric test? (a) needed (b) not needed
25. 25.🧺 Do we need turmeric powder for the turmeric test? (a) needed (b) not needed
26. 26.🧺 Which of these is needed for the turmeric test? (a) a comb (b) a balloon (c) a dropper or spoon (d) yeast
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) turmeric powder (c) white paper strips (d) a comb
28. 28.🟡 Which of these turns turmeric reddish-brown? (a) tamarind water (b) baking soda water (c) sugar water (d) plain water
29. 29.📘 What do we call something that changes colour to show an acid or a base? (a) a prism (b) a pulley (c) an indicator (d) a magnet
30. 30.🫧 Which of these is an acid? (a) salt water (b) sugar water (c) baking soda water (d) tamarind water
31. 31.True or false: curd is an acid. (a) False (b) True
32. 32.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
33. 33.🔍 Which is the odd one out? (a) salt water (b) lemon juice (c) sugar water (d) baking soda water
34. 34.True or false: baking soda water is a base. (a) False (b) True
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is kept the same. (a) False (b) True
36. 36.True or false: vinegar is neutral. (a) False (b) True
37. 37.🫧 Is detergent water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
38. 38.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) sniff each bottle hard (c) mix bathroom cleaners (d) sip each liquid
39. 39.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) False (b) True
40. 40.True or false: a comb is needed for the turmeric test. (a) True (b) False

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