Extraction methods

Froggy Jumps

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Farah Amalina

Malaysia

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Extraction methods


Froggy Jumps Extraction methodsVersion en ligne answer all questions par Farah Amalina 1 What is the main purpose of extraction in natural product chemistry? a To separate bioactive compounds from plant materials b To identify the chemical structure of compounds c To determine the molecular weight of compounds 2 Which of the following is the correct sequence of a general extraction process? a Drying → Grinding → Extraction → Filtration → Concentration b Grinding → Drying → Extraction → Filtration c Extraction → Grinding → Drying → Filtration 3 Why is plant material usually dried before extraction? a To make the plant heavier b To prevent microbial growth and improve extraction efficiency c To remove all bioactive compounds 4 Which step removes solid plant residues from the extract? a Grinding b Drying c Filtration 5 Which factor has the greatest influence on the type of compounds extracted? a Solvent polarity b Colour of the plant c Time of harvesting 6 Which statement best describes the principle of "Like dissolves like"? a Polar solvents dissolve polar compounds. b Large molecules dissolve faster. c All solvents extract the same compounds. 7 Reducing the particle size of plant material generally will: a Decrease the extraction yield. b Increase the surface area available for solvent contact. c Reduce solvent penetration. 8 Why should extraction temperature be carefully controlled? a Heat-sensitive compounds may degrade at high temperatures. b High temperature always increases product quality. c Lower temperatures always produce higher yields 9 Which of the following factors can improve extraction efficiency by increasing contact between solvent and plant material? a Agitation (stirring or shaking) b Harvesting season c Packaging material 10 A researcher wants to extract heat-sensitive flavonoids from fresh herbal leaves. Which extraction condition is most appropriate? a Boiling with water for 2 hours b Using ethanol at room temperature c Heating at 120°C for 3 hours

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Extraction methods

Froggy Jumps

À propos de cette activité

Créé par

Téléchargez la version pour jouer sur papier

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Extraction methodsVersion en ligne

par Farah Amalina

What is the main purpose of extraction in natural product chemistry?

Which of the following is the correct sequence of a general extraction process?

Why is plant material usually dried before extraction?

Which step removes solid plant residues from the extract?

Which factor has the greatest influence on the type of compounds extracted?

Which statement best describes the principle of "Like dissolves like"?

Reducing the particle size of plant material generally will:

Why should extraction temperature be carefully controlled?

Which of the following factors can improve extraction efficiency by increasing contact between solvent and plant material?

A researcher wants to extract heat-sensitive flavonoids from fresh herbal leaves. Which extraction condition is most appropriate?