Question 1: Which of the following is a physical separation technique?

Answer: Filtration

Question 2: Distillation is best used to separate:

Answer: Liquids with different boiling points

Question 3: Which technique is used to separate a soluble solid from a liquid?

Answer: Evaporation

Question 4: True or False: Chromatography can be used to separate pigments in ink.

Answer: True

Question 5: True or False: Filtration can separate dissolved substances from a solution.

Answer: False

Question 6: Explain how fractional distillation separates mixtures. Provide an example.

Answer: Fractional distillation separates mixtures based on differences in boiling points. It is used in the petroleum industry to separate crude oil into fractions like gasoline and diesel.

Question 7: Describe the process of crystallization and its purpose.

Answer: Crystallization is a technique used to purify solid compounds. It involves dissolving the solid in a hot solvent and then slowly cooling the solution to form crystals.

Question 8: What are the advantages of using chromatography in separation processes?

Answer: Chromatography offers high precision, can separate complex mixtures, and requires minimal sample preparation.

Question 9: Calculate the separation efficiency given the formula: Efficiency = (Amount collected/Total amount) x 100. If 50g of a substance is collected from a total of 70g, what is the efficiency?

Answer: 71.43%

Question 10: Match the following separation terms to their definitions:

Answer: See full answer key

Question 11: Order the steps involved in the process of filtration:

Answer: See full answer key

Question 12: Fill in the blank: _____ is used to separate components of a liquid mixture by boiling and condensation.

Answer: Distillation

Question 13: Discuss the role of temperature in the separation of mixtures. Include examples of how temperature affects different separation techniques.

Answer: Temperature plays a crucial role in separation techniques. In distillation, different boiling points allow for separation. In chromatography, temperature can affect the rate of movement of substances. In crystallization, temperature controls solubility and crystal formation.