Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 132 · 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 turns turmeric paper reddish-brown? (a) sugar water (b) soap solution (c) vinegar (d) lemon juice
2. 2.True or false: tamarind water is a base. (a) True (b) False
3. 3.🫧 Is tamarind water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
4. 4.True or false: plain water turns turmeric reddish-brown. (a) False (b) True
5. 5.🫧 Which of these is neutral? (a) sugar water (b) curd (c) tamarind water (d) vinegar
6. 6.📘 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
7. 7.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) green (b) it stays white (c) reddish-brown (d) bright blue
8. 8.🫧 Which of these is an acid? (a) detergent water (b) tamarind water (c) soap solution (d) plain water
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 turmeric paper
10. 10.🔍 Which is the odd one out? (a) detergent water (b) baking soda water (c) vinegar (d) soap solution
11. 11.🟡 Turmeric paper meets detergent water. What happens? (a) stays yellow (b) turns reddish-brown
12. 12.🔍 Which is the odd one out? (a) lemon juice (b) baking soda water (c) tamarind water (d) sugar water
13. 13.True or false: turmeric powder is needed for the turmeric test. (a) False (b) True
14. 14.True or false: salt water keeps turmeric yellow. (a) True (b) False
15. 15.🧺 Which of these is not needed for the turmeric test? (a) a dropper or spoon (b) water (c) turmeric powder (d) a comb
16. 16.🧺 Which of these is needed for the turmeric test? (a) a magnet (b) yeast (c) a comb (d) lemon juice
17. 17.🛟 Turmeric stains clothes. What should you wear? (a) your best clothes (b) an old shirt or apron (c) your school uniform (d) a white party dress
18. 18.🔮 Predict: turmeric paper is dipped in salt water. What happens? (a) it turns red (b) it turns black (c) it turns blue (d) it stays yellow
19. 19.🫧 Which of these is an acid? (a) sugar water (b) salt water (c) soap solution (d) orange juice
20. 20.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a magnet (b) white paper strips (c) lemon juice (d) a dropper or spoon
21. 21.🟡 Why does soap solution change turmeric’s colour? (a) soap water is a base (b) soap is magnetic (c) soap is an acid (d) soap is hot
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) lemon juice (d) a comb
23. 23.🔍 Which is the odd one out? (a) baking soda water (b) detergent water (c) soap solution (d) salt water
24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is kept the same. (a) False (b) True
25. 25.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) tamarind water (c) detergent water (d) lemon juice
26. 26.True or false: soap solution keeps turmeric yellow. (a) True (b) False
27. 27.🧺 Do we need water for the turmeric test? (a) needed (b) not needed
28. 28.True or false: a magnet is not needed for the turmeric test. (a) False (b) True
29. 29.🔮 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
30. 30.🫧 Which of these is an acid? (a) salt water (b) plain water (c) baking soda water (d) vinegar
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 turns green (d) it stays yellow
32. 32.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
33. 33.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the light we look in (b) the turmeric paper (c) the colour we see (d) the liquid we test
34. 34.True or false: plain water is a base. (a) True (b) False
35. 35.True or false: sugar water turns turmeric reddish-brown. (a) True (b) False
36. 36.🔍 Which is the odd one out? (a) detergent water (b) salt water (c) vinegar (d) lemon juice
37. 37.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) turmeric powder (b) water (c) white paper strips (d) yeast
38. 38.🔍 Which is the odd one out? (a) soap solution (b) sugar water (c) detergent water (d) baking soda water
39. 39.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) water (b) white paper strips (c) soap solution (d) a mirror
40. 40.🛟 Which rule keeps the turmeric test safe? (a) sniff each bottle hard (b) use only kitchen items (c) mix bathroom cleaners (d) sip each liquid

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