Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 236 · 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.📘 What do we call something that changes colour to show an acid or a base? (a) a magnet (b) a prism (c) an indicator (d) a pulley
2. 2.🛟 Turmeric stains clothes. What should you wear? (a) an old shirt or apron (b) your school uniform (c) a white party dress (d) your best clothes
3. 3.🫧 Which of these is neutral? (a) orange juice (b) plain water (c) tamarind water (d) curd
4. 4.🫧 Is plain water an acid, a base or neutral? (a) a base (b) neutral (c) an acid
5. 5.🧺 Which of these is needed for the turmeric test? (a) lemon juice (b) a magnet (c) yeast (d) a balloon
6. 6.🫧 Is curd an acid, a base or neutral? (a) a base (b) neutral (c) an acid
7. 7.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns black (b) it turns red (c) it turns blue (d) it stays yellow
8. 8.⚖️ 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 light we look in (c) the liquid we test (d) the turmeric paper
9. 9.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it turns darker red (b) it turns yellow again (c) it disappears (d) it turns blue
10. 10.True or false: plain water is neutral. (a) False (b) True
11. 11.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a comb (b) water (c) a dropper or spoon (d) white paper strips
12. 12.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) reddish (b) white at once (c) green (d) bright blue
13. 13.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a mirror (c) a dropper or spoon (d) a balloon
14. 14.🟡 Turmeric paper meets salt water. What happens? (a) stays yellow (b) turns reddish-brown
15. 15.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the liquid we test”? (a) we measure it (b) we keep it the same (c) we change it
16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we keep it the same (b) we measure it (c) we change it
17. 17.⚖️ 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
18. 18.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we measure it (c) we keep it the same
19. 19.🔮 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
20. 20.True or false: soap solution is needed for the turmeric test. (a) False (b) True
21. 21.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
22. 22.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
23. 23.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
24. 24.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) lemon juice (c) tamarind water (d) detergent water
25. 25.🫧 Which of these is an acid? (a) soap solution (b) orange juice (c) salt water (d) detergent water
26. 26.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the liquid we test (b) the light we look in (c) the turmeric paper (d) the colour we see
27. 27.True or false: salt water turns turmeric reddish-brown. (a) True (b) False
28. 28.True or false: vinegar is a base. (a) True (b) False
29. 29.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
30. 30.🧺 Which of these is needed for the turmeric test? (a) soap solution (b) a comb (c) a magnet (d) a mirror
31. 31.True or false: a dropper or spoon is not needed for the turmeric test. (a) False (b) True
32. 32.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) baking soda water (c) lemon juice (d) detergent water
33. 33.True or false: baking soda water turns turmeric reddish-brown. (a) False (b) True
34. 34.🫧 Is tamarind water an acid, a base or neutral? (a) an acid (b) neutral (c) a base
35. 35.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) mix bathroom cleaners (c) sip each liquid (d) use only kitchen items
36. 36.🟡 Turmeric paper meets soap solution. What happens? (a) turns reddish-brown (b) stays yellow
37. 37.🫧 Which of these is an acid? (a) baking soda water (b) plain water (c) salt water (d) curd
38. 38.True or false: a mirror is needed for the turmeric test. (a) True (b) False
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) lemon juice (c) a dropper or spoon (d) a balloon
40. 40.🟡 Which of these keeps turmeric yellow? (a) soap solution (b) tamarind water (c) detergent water (d) baking soda water

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