Chemical Reactions Quiz

A catalyst is:

• a. a solid product of a reaction.

• b. one of the reactants in a single-replacement reaction.

• c. not used up in a reaction.

• d. the product of a combustion reaction.

When the equation Fe + O₂ → Fe₂O₃ is balanced, the coefficient for O₂ is:

• a. 4

• b. 3

• c. 2

• d. 1

The reaction in question 13 is an example of a(n):

• a. aqueous reaction.

• b. single-replacement reaction.

• c. combination reaction.

• d. decomposition reaction.

The equation H₃PO₄ + 3KOH → K₃PO₄ + 3H₂O is an example of which type of reaction?

• a. double-replacement

• b. combination

• c. decomposition

• d. single-replacement

In a double-replacement reaction:

• a. the reactants are usually a metal and a nonmetal.

• b. the reactants are generally two ionic compounds in aqueous solution.

• c. one of the reactants is often water.

• d. energy in the form of heat or light is always produced.

In a double-replacement reaction:

• a. one of the products is always a gas.

• b. one of the products must be an element.

• c. positive ions are exchanged between two compounds.

• d. all of the above

When the following equation is balanced, the coefficient in front of HCl is:

• a. 6

• b. 3

• c. 1

• d. 2

The equation in question 19 is an example of which type of reaction?

• a. combustion

• b. single-replacement

• c. decomposition

• d. double-replacement

Which of the following statements is incorrect?

• a. Complete combustion has occurred when all the carbon in the product is in the form of carbon dioxide.

• b. A single reactant is the identifying characteristic of a decomposition reaction.

• c. The only way to determine the products of a reaction is to perform the reaction.

• d. All chemical reactions can be classified as one of four general types.

A chemical formula written above or below the yield sign indicates:

• that a gas is formed.

• that the substance is used as a catalyst.

• that heat must be supplied.

• a reversible reaction.