Chemistry Year 8 Quiz- MC

What is a mixture?

• A mixture is a substance made by combining two or more different materials through a chemical reaction.
• A mixture is a substance made by combining two or more identical materials without a chemical reaction.
• A mixture is a substance made by combining two or more different materials without a chemical reaction.
• A mixture is a pure substance made by combining two or more different materials without a chemical reaction.

Which description best fits a gas?

• A gas is a state of matter that has no definite shape or volume.
• A gas is a state of matter that is always in liquid form
• A gas is a state of matter that has a definite shape
• A gas is a state of matter that has a definite volume

What is a chemical change?

• A chemical change is a process in which substances are converted into different substances with opposite properties.
• A chemical change is a process in which one or more substances are converted into different substances with different properties.
• A chemical change is a process in which substances remain the same but change color.
• A chemical change is a process in which substances are converted into different substances with the same properties.

Why does a precipitate form in some chemical reactions?

• A precipitate forms because of the presence of a catalyst in a chemical reaction.
• A precipitate forms as a result of the reaction being conducted at high pressure.
• A precipitate forms due to the release of energy in a chemical reaction.
• A precipitate forms due to the formation of an insoluble solid compound in a chemical reaction.

What is produced in a neutralisation reaction?

What is diffusion?

• Diffusion is the movement of particles through a vacuum.
• Diffusion is the process of converting solids into liquids.
• Diffusion is the movement of particles from an area of low concentration to an area of high concentration.
• Diffusion is the movement of particles from an area of high concentration to an area of low concentration.

Which metal reacts most vigorously with water?

• Lithium

• Sodium

• Potassium

• Calcium

Which of the following is a non-metal?

• Gold

• Iron

• Oxygen

• Copper

Which characteristic is NOT associated with metals?

• Malleable

• Ductile

• Does not conduct electricity

• Shiny appearance

What is the charge of a proton?

• Positive (+1)

• Negative (-1)

• Neutral (0)

• Variable