Question 1

Which of the following best describes the process of filtration as used in a chemistry laboratory?

Accepted Answer

It separates an insoluble solid from a liquid by passing the mixture through a filter.

Question 2

During filtration, what is the term for the solid that remains on the filter paper?

Accepted Answer

Residue

Question 3

In the filtration process, what is the name given to the liquid that passes through the filter paper?

Accepted Answer

Filtrate

Question 4

Which of the following mixtures can be separated by filtration?

Accepted Answer

Sand mixed with water

Question 5

A student wants to separate coffee grounds from brewed coffee. Which separation technique should they use?

Accepted Answer

Filtration

Question 6

Which property is primarily used to separate a soluble solid from a liquid during evaporation?

Accepted Answer

Boiling point

Question 7

During evaporation, what happens to the solvent?

Accepted Answer

It is converted into a gas and leaves the solution.

Question 8

Which of the following is a real-life example of using evaporation to separate a mixture?

Accepted Answer

Obtaining salt from seawater by letting the water evaporate

Question 9

A mixture of sand and salt is added to water and stirred. Which sequence of separation techniques would best separate both components?

Accepted Answer

Filtration followed by evaporation

Question 10

Which equation best represents the process of evaporation for a solution of salt in water?

Accepted Answer

$$\mathrm{NaCl_{(aq)}} \rightarrow \mathrm{NaCl_{(s)}} + \mathrm{H_2O_{(g)}}$$

Question 11

Why can't filtration be used to separate a solution of sugar dissolved in water?

Accepted Answer

Because both sugar and water pass through the filter paper

Question 12

Which of the following statements about filtration is correct?

Accepted Answer

Filtration separates an insoluble solid from a liquid.

Question 13

A mixture contains sand, salt, and water. After stirring, which component will be collected as the residue after filtration?

Accepted Answer

Sand

Question 14

Which of the following best explains why evaporation can be used to recover salt from seawater?

Accepted Answer

Water evaporates, leaving the non-volatile salt behind.

Question 15

A chemist needs to separate a mixture of chalk (insoluble in water) and sodium chloride (soluble in water). Which steps should they follow?

Accepted Answer

Add water, filter to remove chalk, then evaporate the filtrate to recover sodium chloride.

Question 16

Which of the following is NOT a step in the filtration process?

Accepted Answer

Heating the mixture to evaporate the solvent

Question 17

If a mixture contains both an insoluble and a soluble solid in water, which technique would you use first to separate the insoluble solid?

Accepted Answer

Filtration

Question 18

Which of the following best describes the filtrate in a filtration process?

Accepted Answer

The liquid that passes through the filter paper

Question 19

A student is trying to recover pure water from a saltwater solution. Which method should they use?

Accepted Answer

Distillation

Question 20

Which of the following is a correct statement about the difference between filtration and evaporation?

Accepted Answer

Filtration separates insoluble solids from liquids, while evaporation separates soluble solids from liquids.

Separation Techniques in GOB Chemistry: Filtration and Evaporation

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