
Caffeine Extraction and Crystallization Process

Interactive Video
•
Chemistry, Science, Biology
•
9th - 10th Grade
•
Hard

Patricia Brown
FREE Resource
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main focus of Chemistry Paper 6, Question 4?
To analyze the chemical composition of coffee beans.
To study the effects of caffeine on human health.
To extract a pure crystalline sample of caffeine from coffee beans.
To determine the caffeine content in different types of coffee.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which property of caffeine is crucial for its extraction from coffee beans?
It is very soluble in cold water but less in hot water.
It is equally soluble in both hot and cold water.
It is very soluble in hot water but much less in cold water.
It is insoluble in both hot and cold water.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in the procedure to extract caffeine from coffee beans?
Soak the coffee beans in cold water.
Crush or grind the coffee beans to a fine powder.
Boil the coffee beans in hot water.
Filter the coffee beans directly.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
After dissolving the coffee bean residue in hot water, what is the next step?
Directly evaporate the solution.
Add more cold water to the solution.
Filter the solution to separate caffeine.
Add a chemical reagent to precipitate caffeine.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using cold water in the caffeine extraction process?
To initiate the crystallization process.
To dissolve caffeine completely.
To separate caffeine from other soluble substances.
To increase the solubility of all substances.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the final step in obtaining pure caffeine crystals?
Filter the crystals again.
Boil the solution until dry.
Wash the crystals with distilled water and dry them.
Add more hot water to the crystals.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it important to allow the filtrate to cool during crystallization?
To dissolve the caffeine completely.
To separate impurities from caffeine.
To speed up the evaporation process.
To allow caffeine crystals to form.
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