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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 274 · 40 questions
TalentJR

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.

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

Answer key

  1. soap solution
  2. reddish-brown
  3. detergent water
  4. tamarind water
  5. needed
  6. use only kitchen items
  7. False
  8. we change it
  9. True
  10. an acid
  11. reddish-brown
  12. False
  13. False
  14. True
  15. a balloon
  16. detergent water
  17. not needed
  18. needed
  19. True
  20. it turns yellow again
  21. True
  22. stays yellow
  23. an acid
  24. not needed
  25. turns reddish-brown
  26. water
  27. needed
  28. lemon juice
  29. salt water
  30. it stays yellow
  31. True
  32. baking soda water
  33. reddish
  34. stays yellow
  35. lemon juice
  36. True
  37. not needed
  38. we measure it
  39. stays yellow
  40. vinegar

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