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Turmeric Indicator Experiment Worksheet

Science experiments lesson 12: Turmeric indicator: acid or base? · Set 262 · 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) plain water (b) sugar water (c) soap solution (d) tamarind water
  2. 2.🧺 Three of these are needed for the turmeric test. Which one is NOT needed? (a) a balloon (b) lemon juice (c) soap solution (d) turmeric powder
  3. 3.🫧 Which of these is neutral? (a) soap solution (b) tamarind water (c) plain water (d) vinegar
  4. 4.🧺 Do we need water for the turmeric test? (a) not needed (b) needed
  5. 5.⚖️ 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 change it (c) we measure it
  6. 6.🧺 Which of these is not needed for the turmeric test? (a) white paper strips (b) soap solution (c) a balloon (d) turmeric powder
  7. 7.🍋 A drop of lemon juice falls on turmeric paper. What happens? (a) it turns blue (b) it stays yellow (c) it turns red (d) it turns black
  8. 8.🟡 Turmeric paper is dipped in soap solution. What colour does it turn? (a) reddish-brown (b) it stays white (c) green (d) bright blue
  9. 9.🧺 Do we need a comb for the turmeric test? (a) not needed (b) needed
  10. 10.🔍 Which is the odd one out? (a) soap solution (b) plain water (c) baking soda water (d) detergent water
  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.True or false: lemon juice is an acid. (a) True (b) False
  13. 13.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? Which of these is what we measure? (a) the number of drops (b) the light we look in (c) the liquid we test (d) the colour we see
  14. 14.🫧 Is lemon juice an acid, a base or neutral? (a) an acid (b) neutral (c) a base
  15. 15.🟡 Turmeric paper meets sugar water. What happens? (a) turns reddish-brown (b) stays yellow
  16. 16.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the light we look in is the one thing we change. (a) True (b) False
  17. 17.🟡 Which of these turns turmeric reddish-brown? (a) salt water (b) lemon juice (c) sugar water (d) detergent water
  18. 18.🟡 Turmeric paper meets soap solution. What happens? (a) stays yellow (b) turns reddish-brown
  19. 19.🫧 Which of these is neutral? (a) sugar water (b) vinegar (c) orange juice (d) baking soda water
  20. 20.True or false: sugar water is an acid. (a) False (b) True
  21. 21.🧺 Which of these is not needed for the turmeric test? (a) water (b) a dropper or spoon (c) soap solution (d) a mirror
  22. 22.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) salt water
  23. 23.🟡 Turmeric paper meets baking soda water. What happens? (a) stays yellow (b) turns reddish-brown
  24. 24.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? What do we do with “the light we look in”? (a) we keep it the same (b) we measure it (c) we change it
  25. 25.🫧 Is orange juice an acid, a base or neutral? (a) an acid (b) a base (c) neutral
  26. 26.🛟 Which rule keeps the turmeric test safe? (a) mix bathroom cleaners (b) sniff each bottle hard (c) sip each liquid (d) use only kitchen items
  27. 27.True or false: lemon juice turns turmeric reddish-brown. (a) True (b) False
  28. 28.🔍 Which is the odd one out? (a) plain water (b) salt water (c) detergent water (d) lemon juice
  29. 29.🫧 Which of these is an acid? (a) detergent water (b) sugar water (c) orange juice (d) baking soda water
  30. 30.🫧 Which of these is neutral? (a) orange juice (b) salt water (c) baking soda water (d) detergent water
  31. 31.⚖️ 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
  32. 32.🔍 Which is the odd one out? (a) detergent water (b) soap solution (c) baking soda water (d) salt water
  33. 33.True or false: salt water is an acid. (a) True (b) False
  34. 34.🟡 Which of these keeps turmeric yellow? (a) baking soda water (b) soap solution (c) detergent water (d) plain water
  35. 35.🔮 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
  36. 36.🧺 Do we need a magnet for the turmeric test? (a) not needed (b) needed
  37. 37.⚖️ Fair test — which liquids turn turmeric paper reddish-brown? True or false: the number of drops is kept the same. (a) True (b) False
  38. 38.🟡 Which of these turns turmeric reddish-brown? (a) soap solution (b) tamarind water (c) plain water (d) lemon juice
  39. 39.True or false: plain water is neutral. (a) False (b) True
  40. 40.True or false: soap solution is a base. (a) False (b) True

Answer key

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

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