Mixtures and separation

In chemistry, a solution contains

• An answer to a problem

• A solvent and a solute

• A solvent and suspended particles.

• A solution and a solvent

A suspension contains:

• A bridge hanging over a valley

• A solvent and a solute

• A solvent and suspended particles

• A solution and a solvent

Pure substances contain: 

• Only one type of substance

• Substances that cannot be chemically separated

• A solvent and a solute

• All of the above

A soluble substance will

• Form small particles to form a clear suspension

• Dissolve to form a cloudy solution

• Dissolve to form a clear solution

• Form small particles to form a cloudy suspension

Which is the best separation technique to get salt from salty water?

• Evaporation

• Filtration

• Distillation

• Sieving

What is the correct order for obtaining salt from a mixture of sand and salt?

• Dissolving in water - filtration - evaporation

• Evaporation - filtration - dissolving in water

• Filtration - dissolving in water - evaporation

• Dissolving in water-sieving- decanting

Which part of the following mixture (sugar, sand and water) would pass through filter paper?

• Sugar and water

• Sand

• Water

• Sugar

Which statement about mixtures is FALSE?

• A mixture contains more than one ingredient.

• A mixture can be separated.

• The ingredients of a mixture keep their physical properties.

• All mixtures are food or drink.

Which of the following is not an example of a mixture?

• Lemonade

• Sodium chloride

• Fruit salad

• Food colouring and water

The best method of separating a solution from a suspension is

• Filtration

• Settling

• Decanting

• Sieving