30. Paula melted a certain material after some time there were parts of the material that is melted and some parts that were not melted. What can be inferred from this observation? A. The material was a mixture B. The material was a pure substance C. The material was composed of a single material D. The material was a pure substance because it melted 31. Sodium chloride dissolves in water very well which is NOT TRUE in the following statements? A. Water is a pure substance B. Sodium chloride is a pure substance C. Dissolving sodium chloride with water produces mixture D. Dissolving sodium chloride with water produces a new substance 32. Which of the following lists of materials are composed of mixture? A. vinegar, 70% alcohol, carbon B. b. salad, calamansi juice, air C. c. oxygen, sodium chloride, water D. d. carbon dioxide, bleach, oil 33. Which of the following lists of materials are composed of substance? A. orange juice, water, salad B. b. blood, calamansi juice, air C. c. oxygen, iron, milk D. d. salt, water, gold 34. Which of the following best describes the temperature of a pure substance at different time? A. Constant C. Heterogeneous B Differing D. Varying 35. At sea level, an odorless and colorless material boils at 100 degree Celsius and freezes at O degree Celsius. What inference can be drawn from this observation? A. The material is a metal B. The material is a mixture C. The material is a non-metal D. The material is a pure substance 36. Which of the following defines a saturated solution? A. Less amount of solute than the maximum amount it can dissolve. B. Small amount of dissolved solute in comparison to the amount of solvent C. The amount of solute in each volume of solution per milligram of solution. D. A solution that contains the maximum amount of solute dissolved by a given amount of solvent. 37. What solution is formed when there is a small amount of dissolve solute in comparison with the dissolving capacity of a given amount of solvent? A Saturated C. Unsaturated B. Super saturated D. Concentrated 38. You believe that a cup of boiling water can still dissolve more juice powder. When this happen, the water becomes (a) A Supersaturated C. Soluble B. Solution D. Unsaturated 4​