7-2 Types of Reactions

Multiple Choice

Which of the following best describes a synthesis reaction?

• Two or more substances combine to form a single product

• A compound breaks down into simpler substances

• Two compounds exchange elements to form new compounds

• A substance reacts with oxygen to produce energy

Multiple Choice

Which type of reaction involves a compound breaking down into simpler substances, and what is a common application of this reaction?

• Decomposition reaction; cement production

• Replacement reaction; water purification

• Combustion reaction; fuel burning

• Oxidation-reduction reaction; metal corrosion

Multiple Choice

Which of the following statements about oxidation-reduction reactions is correct?

• Oxidation is the gain of electrons

• Reduction is the loss of electrons

• Oxidation involves the loss of electrons

• Reduction always requires oxygen

Multiple Select

Select all the methods that can be used to identify chemical reactions in a lab setting.

• Observing physical changes

• Analyzing reactants and products

• Writing balanced chemical equations

• Measuring temperature only

Multiple Choice

What is the general equation for a synthesis reaction?

• A + B → AB

• AB → A + B

• A + B → A + B

• AB → A