Chemical Reactions Review Questions. Which of the following statements describes a chemical change? A.A gas is given off when a liquid boils B. A solid.

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Presentation transcript:

Chemical Reactions Review Questions

Which of the following statements describes a chemical change? A.A gas is given off when a liquid boils B. A solid forms when a liquid freezes C. A new substance is formed with different properties D. A solid dissolves in a liquid

Which of the following statements describes a chemical change? A.A gas is given off when a liquid boils B. A solid forms when a liquid freezes C. A new substance is formed with different properties D. A solid dissolves in a liquid

Which of the following is NOT a sign of a chemical change? A.Gas Formation B. Solid Formation C. Energy Change D. State Change

Which of the following is NOT a sign of a chemical change? A.Gas Formation B. Solid Formation C. Energy Change D. State Change

Which of the following occurs when water freezes? A.Physical Change B. Chemical Reaction C. Ionic Bond D. Covalent Bond

Which of the following occurs when water freezes? A.Physical Change B. Chemical Reaction C. Ionic Bond D. Covalent Bond

What is the force that holds atoms together in a molecule called? A.Chemical Solution B. Chemical Mixture C. Chemical Reaction D. Chemical Bond

What is the force that holds atoms together in a molecule called? A.Chemical Solution B. Chemical Mixture C. Chemical Reaction D. Chemical Bond

What causes chemical bonds in molecules to break? A.Molecules bump into each other with enough energy to break them B. Different substances are combined in a solution C. The temperature of a solution is lowered D. A solid dissolves in a liquid

What causes chemical bonds in molecules to break? A.Molecules bump into each other with enough energy to break them B. Different substances are combined in a solution C. The temperature of a solution is lowered D. A solid dissolves in a liquid

How do substances form during a chemical reaction? A.One or more substances are combined B. Chemical bonds in molecules add atoms to make more molecules C. A solid substance is formed in a solution D. Chemical bonds break, atoms then rearrange, and finally new chemical bonds form

How do substances form during a chemical reaction? A.One or more substances are combined B. Chemical bonds in molecules add atoms to make more molecules C. A solid substance is formed in a solution D. Chemical bonds break, atoms then rearrange, and finally new chemical bonds form