Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 519 · 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 is the odd one out? (a) lemon juice (b) soap solution (c) vinegar (d) salt water
2. 2.🫧 Which of these is a base? (a) orange juice (b) baking soda water (c) vinegar (d) tamarind water
3. 3.🧺 Do we need white paper strips for the turmeric test? (a) not needed (b) needed
4. 4.🫧 Which of these is neutral? (a) curd (b) tamarind water (c) vinegar (d) plain water
5. 5.🟡 Turmeric paper meets lemon juice. What happens? (a) turns reddish-brown (b) stays yellow
6. 6.⚖️ 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
7. 7.🟡 Turmeric paper meets vinegar. What happens? (a) turns reddish-brown (b) stays yellow
8. 8.True or false: sugar water is a base. (a) False (b) True
9. 9.True or false: salt water is an acid. (a) True (b) False
10. 10.⚖️ 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
11. 11.🧺 Which of these is needed for the turmeric test? (a) yeast (b) turmeric powder (c) a comb (d) a battery cell
12. 12.⚖️ 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 light we look in
13. 13.🧺 Do we need a mirror for the turmeric test? (a) not needed (b) needed
14. 14.True or false: tamarind water is an acid. (a) False (b) True
15. 15.🫧 Which of these is an acid? (a) plain water (b) baking soda water (c) tamarind water (d) detergent water
16. 16.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) green (b) reddish (c) bright blue (d) white at once
17. 17.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) sugar water (c) soap solution (d) lemon juice
18. 18.🟡 Which of these turns turmeric paper reddish-brown? (a) vinegar (b) sugar water (c) lemon juice (d) soap solution
19. 19.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the turmeric paper”? (a) we keep it the same (b) we measure it (c) we change it
20. 20.🟡 Turmeric paper meets baking soda water. What happens? (a) turns reddish-brown (b) stays yellow
21. 21.🛟 Turmeric stains clothes. What should you wear? (a) a white party dress (b) your school uniform (c) an old shirt or apron (d) your best clothes
22. 22.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) soap solution (b) a dropper or spoon (c) yeast (d) water
23. 23.🔍 Which is the odd one out? (a) vinegar (b) lemon juice (c) sugar water (d) baking soda water
24. 24.True or false: salt water is a base. (a) True (b) False
25. 25.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) soap solution (c) a magnet (d) white paper strips
26. 26.True or false: tamarind water keeps turmeric yellow. (a) True (b) False
27. 27.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a battery cell (b) water (c) lemon juice (d) a dropper or spoon
28. 28.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns blue (b) it turns darker red (c) it disappears (d) it turns yellow again
29. 29.🟡 Turmeric paper meets plain water. What happens? (a) stays yellow (b) turns reddish-brown
30. 30.True or false: soap solution is a base. (a) True (b) False
31. 31.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
32. 32.True or false: a magnet is needed for the turmeric test. (a) False (b) True
33. 33.True or false: plain water is neutral. (a) True (b) False
34. 34.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) white paper strips (c) lemon juice (d) a balloon
35. 35.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it stays yellow (b) it turns blue (c) it turns black (d) it turns red
36. 36.🔮 Predict: turmeric paper is dipped in baking soda water. What colour does it turn? (a) it turns blue (b) it stays yellow (c) it turns green (d) reddish-brown
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) a dropper or spoon (c) white paper strips (d) a mirror
38. 38.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the colour we see (c) the liquid we test (d) the turmeric paper
39. 39.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
40. 40.🛟 Which rule keeps the turmeric test safe? (a) use only kitchen items (b) mix bathroom cleaners (c) sip each liquid (d) sniff each bottle hard

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