Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 287 · 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 keeps turmeric yellow? (a) baking soda water (b) soap solution (c) vinegar (d) detergent water
2. 2.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is what we measure. (a) True (b) False
3. 3.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the number of drops”? (a) we change it (b) we keep it the same (c) we measure it
4. 4.🫧 Which of these is neutral? (a) lemon juice (b) sugar water (c) vinegar (d) curd
5. 5.True or false: plain water turns turmeric reddish-brown. (a) True (b) False
6. 6.🫧 Which of these is an acid? (a) salt water (b) detergent water (c) sugar water (d) curd
7. 7.🫧 Is plain water an acid, a base or neutral? (a) an acid (b) a base (c) neutral
8. 8.🫧 Which of these is a base? (a) vinegar (b) baking soda water (c) lemon juice (d) orange juice
9. 9.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the colour we see”? (a) we change it (b) we keep it the same (c) we measure it
10. 10.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) lemon juice
11. 11.🍋 A reddish turmeric spot gets a few drops of lemon juice. What happens? (a) it disappears (b) it turns yellow again (c) it turns blue (d) it turns darker red
12. 12.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) bright blue (b) green (c) it stays white (d) reddish-brown
13. 13.True or false: lemon juice keeps turmeric yellow. (a) True (b) False
14. 14.🟡 Which of these turns turmeric reddish-brown? (a) vinegar (b) soap solution (c) sugar water (d) lemon juice
15. 15.🧺 Do we need soap solution for the turmeric test? (a) not needed (b) needed
16. 16.True or false: detergent water keeps turmeric yellow. (a) True (b) False
17. 17.🧺 Which of these is needed for the turmeric test? (a) yeast (b) a magnet (c) a comb (d) turmeric powder
18. 18.True or false: curd is neutral. (a) True (b) False
19. 19.🛟 Which rule keeps the turmeric test safe? (a) sip each liquid (b) mix bathroom cleaners (c) use only kitchen items (d) sniff each bottle hard
20. 20.True or false: orange juice is an acid. (a) True (b) False
21. 21.🧺 Do we need a magnet for the turmeric test? (a) needed (b) not needed
22. 22.🟡 Which of these turns turmeric reddish-brown? (a) plain water (b) detergent water (c) lemon juice (d) vinegar
23. 23.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) detergent water (d) baking soda water
24. 24.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a magnet (c) a comb (d) white paper strips
25. 25.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is the one thing we change? (a) the light we look in (b) the number of drops (c) the turmeric paper (d) the liquid we test
26. 26.🔮 Predict: a yellow curry stain on a shirt is washed with soap. What colour may it turn? (a) bright blue (b) green (c) white at once (d) reddish
27. 27.True or false: baking soda water keeps turmeric yellow. (a) False (b) True
28. 28.🧺 Which of these is not needed for the turmeric test? (a) soap solution (b) a mirror (c) white paper strips (d) turmeric powder
29. 29.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is kept the same? (a) the colour we see (b) the liquid we test (c) the turmeric paper
30. 30.🫧 Is salt water an acid, a base or neutral? (a) a base (b) an acid (c) neutral
31. 31.🫧 Which of these is an acid? (a) plain water (b) detergent water (c) lemon juice (d) sugar water
32. 32.True or false: soap solution is not needed for the turmeric test. (a) False (b) True
33. 33.🫧 Which of these is an acid? (a) salt water (b) vinegar (c) soap solution (d) plain water
34. 34.True or false: tamarind water turns turmeric reddish-brown. (a) False (b) True
35. 35.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the liquid we test is what we measure. (a) False (b) True
36. 36.True or false: plain water keeps turmeric yellow. (a) False (b) True
37. 37.🧺 Which of these is needed for the turmeric test? (a) a battery cell (b) a comb (c) yeast (d) soap solution
38. 38.🫧 Is soap solution an acid, a base or neutral? (a) an acid (b) a base (c) neutral
39. 39.🧺 Which of these is needed for the turmeric test? (a) a mirror (b) water (c) a balloon (d) a comb
40. 40.True or false: orange juice is neutral. (a) False (b) True

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