Kuis Kimia Dasar

What is a mixture?

• A pure substance

• A compound that is chemically bonded

• A physical combination of substances

• An element

Which method is best for separating sand from water?

• Evaporation

• Distillation

• Filtration

• Chromatography

Salt can be separated from saltwater by:

• Filtration

• Chromatography

• Evaporation

• Distillation

In a solution of sugar and water, sugar is:

• Solvent

• Mixture

• Solute

• Gas

Saturated solution:

• Does not contain solute

• Contains the maximum amount of solute that can dissolve

• Contains more solute than solvent

• Can dissolve more solute

What affects solubility?

• Color of the solute

• Properties of the solvent

• Shape of the container

• Mass of the mixture

Chemical changes always:

• Form new substances

• Can be reversed

• Form mixtures

• Only change states

Which of the following is a chemical reaction?

• Melting ice

• Boiling water

• Burning paper

• Dissolving sugar

Which reaction produces carbon dioxide?

• Acid + Metal

• Acid + Carbonate

• Neutralization

• Combustion of hydrogen

Which of the following is NOT a sign of a chemical reaction?

• Change in temperature

• Change in color

• Change of state (such as melting)

• Formation of gas