Filtration and Crystallisation

Question 1

What is filtration used for in chemistry?

Answer 1

Filtration is used to separate solids from liquids or gases using a filter medium that allows only the fluid to pass through.

Question 2

True or False: Crystallisation is a method used to purify solid compounds.

Answer 2

True

Question 3

Fill in the blank: The process of ______ involves forming solid crystals from a solution.

Answer 3

crystallisation

Question 4

What is the main purpose of using a filter paper in filtration?

Answer 4

The main purpose of filter paper is to trap solid particles while allowing the liquid to pass through.

Question 5

Which method is more effective for purifying a substance: filtration or crystallisation?

Answer 5

Crystallisation is generally more effective for purifying solid substances.

Question 6

What is the role of a solvent in the process of crystallisation?

Answer 6

The solvent dissolves the solute at high temperatures, allowing it to crystallise when the solution cools.

Question 7

Multiple Choice: What type of mixture can be separated by filtration? A) Homogeneous B) Heterogeneous

Answer 7

B) Heterogeneous

Question 8

True or False: Filtration can be used to separate a soluble solid from a liquid.

Answer 8

False

Question 9

What is the term for the solid that forms during crystallisation?

Answer 9

The solid that forms is called a crystal or precipitate.

Question 10

Fill in the blank: The process of ______ is often followed by evaporation to obtain pure crystals.

Answer 10

crystallisation

Question 11

What is the first step in the filtration process?

Answer 11

The first step is to pour the mixture through the filter paper.

Question 12

What is the importance of cooling the solution slowly during crystallisation?

Answer 12

Cooling the solution slowly allows larger, purer crystals to form.

Question 13

Multiple Choice: Which of the following is NOT a step in crystallisation? A) Dissolving the solute B) Cooling the solution C) Boiling the solution

Answer 13

C) Boiling the solution

Question 14

What type of filter should be used for fine particles?

Answer 14

A fine filter paper or a membrane filter should be used for fine particles.

Question 15

What happens to the solubility of most solids as the temperature increases?

Answer 15

The solubility of most solids increases as the temperature increases.