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Chemistry Quiz 2
Physical and chemical change quiz review
Question | Answer |
---|---|
When heat is applied to a substance, the speed of the molecules... | Increases |
What is the freezing point of water? | 0 degrees Celsius |
What phase are particles generally the closest? | Solid |
What is the boiling point of water? | 100 degrees Celsius |
A substance is easiest to compress when it is a... | Gas |
Molecules move most freely when they are in... | The gas phase |
What kind of change must occur to form a compound? | Chemical change |
What is the substance in a solution that dissolved called? | Solutes |
What is the substance in a solution that the solute dissolves in? | Solvents |
Recovering the solute from the solution can be done by... | Evaporation |
What is a mixture? | When two or more substances come together but don't form a new substance |
What is a solution? | When two substances combine and one dissolves in the other |
What is the most common solvent? | Water |
Undissolved solid particles can best be separated from a solution by... | Filtering |
The solubility of most solids in water can be increased by... | Increasing temperature |
What is a physical property? | A characteristic of a material that can be observed or measured without changing the identity of the material |
What is a physical change? | A change in physical property |
What are some examples of physical properties? | Length, mass, volume, density, colour, weight, state of matter |
What is a chemical property? | A characteristic of a material that gives a substance the ability to undergo a change that will result in a new substance |
What are some examples of chemical properties? | Flammability, meets with water, meets with oxygen |
What is a chemical change? | A change in the identity of the substance that happened because of chemical properties |
What is an aqueous solution? | A solution in which water is the solvent |
What makes something nonpolar? | It has an even distribution of electrons; it is symmetrical |
What makes something polar? | It is assymetrical |
What does like dissolves like mean? | Polar solvents dissolve polar solutes and nonpolar solvents dissolve nonpolar solutes |
What is the process of state changing from liquid to gas called? | Evaporation |
What is the process of state changing from gas to liquid called? | Condensation |
What is the process of state changing from solid to liquid called? | Melting |
What is the process of state changing from liquid to solid called? | Freezing |
What is the process of state changing from solid to gas called? | Sublimation |
What is the process of state changing from gas to solid called? | Deposition |