CHEM - Types of Reactions Quiz

Symbols used in equations, together with the explanations of the symbols, are shown below. Which set is

correct?

a. (g), grams

b. (l), liters

c. (aq), dissolved in water

d. (s), solid product

c. (aq), dissolved in water

In the chemical equation H2 O2 (aq) → H2 O(l) O2 (g), the O2 is a ____.

a. catalyst

b. solid

c. product

d. reactant

c. product

What are the coefficients that will balance the skeleton equation below?

AlCl3 + NaOH -> Al(OH)3 + NaCl

a. 1, 3, 1, 3

b. 3, 1, 3, 1

c. 1, 1, 1, 3

d. 1, 3, 3, 1

a. 1, 3, 1, 3

When the equation Fe + Cl2 -> FeCl3 is balanced, what is the coefficient for Cl ?

a. 1

b. 2

c. 3

d. 4

c. 3

Which of the following statements is NOT true about what happens in all chemical reactions?

a. The ways in which atoms are joined together are changed.

b. New atoms are formed as products.

c. The starting substances are called reactants.

d. The bonds of the reactants are broken and new bonds of the products are formed

b. New atoms are formed as products.

Chemical equations must be balanced to satisfy ____.

a. the law of definite proportions

b. the law of multiple proportions

c. the law of conservation of mass

d. Avogadro's principle

c. the law of conservation of mass

In every balanced chemical equation, each side of the equation has the same number of ____.

a. atoms of each element

b. molecules

c. moles

d. coefficients

a. atoms of each element

The reaction 2Fe + 3Cl2 -> 2FeCl3 is an example of which type of reaction?

a. combustion reaction

b. single-replacement reaction

c. composition reaction

d. decomposition reaction

c. composition reaction

The equation Mg(s) + 2HCl(aq) -> MgCl (aq) + H (g) is an example of which type of reaction?

a. combination reaction

b. single-replacement reaction

c. decomposition reaction

d. double-replacement reaction

b. single-replacement reaction

The equation H3 PO4 + 3KOH -> K3 PO3 3H2 O is an example of which type of reaction?

a. double-replacement reaction b. combination reaction

c. decomposition reaction

d. single-replacement reaction

a. double-replacement reaction

The equation 2C3 H2 OH + 9O2 -> 6CO2 8H2 O is an example of which type of reaction?

a. combustion reaction

b. single-replacement reaction

c. double-replacement reaction d. decomposition reaction

a. combustion reaction

The type of reaction that takes place when one element reacts with a compound to form a new compound and

a different element is a ____.

a. combination reaction

b. decomposition reaction

c. single-replacement reaction

d. double-replacement reaction

c. single-replacement reaction

If a combination reaction takes place between rubidium and bromine, the chemical formula for the product is

____.

a. RuBr

b. Rb Br

c. RbBr

d. RbBr

d. RbBr

Which of the following is a balanced equation representing the decomposition of lead(IV) oxide?

a. PbO2 -> Pb + 2O

b. PbO2 -> Pb + O2

c. Pb2 O -> 2Pb + O

d. PbO -> Pb + O2

b. PbO2 -> Pb + O2

In order to predict whether or not a single-replacement reaction takes place, you need to consult a chart that

shows the ____.

a. periodic table

b. activity series of metals

c. common polyatomic ions

d. ionic charges of representative elements

b. activity series of metals

In order for the reaction 2Al + 6HCl -> 2AlCl3 + 3H2 to occur, which of the following must be true?

a. Al must be above Cl on the activity series.

b. Al must be above H on the activity series.

c. Heat must be supplied for the reaction.

d. A precipitate must be formed.

b. Al must be above H on the activity series.

What is the balanced chemical equation for the reaction that takes place between bromine and sodium iodide?

a. Br2 NaI -> NaBr2 + I

b. Br2 + 2NaI ->

2NaBr + I2

c. Br + NaI2 -> NaBrI2 d. Br + NaI2 -> NaBr + I2

b. Br2 + 2NaI ->

2NaBr + I2

In a combustion reaction, one of the reactants is ____.

a. hydrogen

b. nitrogen

c. oxygen

d. a metal

c. oxygen

Which of the following statements is NOT correct?

a. The only way to determine the products of a reaction is to carry out the reaction.

b. All chemical reactions can be classified as one of five general types.

c. Complete combustion has occurred when all the carbon in the product is in the form of

carbon dioxide.

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

b. All chemical reactions can be classified as one of five general types.

Which of the following statements is true about single-replacement reactions?

a. They are restricted to metals. c. Two reactants produce two products.

b. They involve a single product.

c. Two reactants produce two products.

d. Any metal replaces any other metal

c. Two reactants produce two products.

Use the activity series of metals to complete a balanced chemical equation for the following single

replacement reaction.

Ag(s) KNO (aq) ->

a. AgNO3 + K

b. AgK + NO3

c. AgKNO3

d. No reaction takes place because silver is less reactive than potassium.

d. No reaction takes place because silver is less reactive than potassium.

Which of the following statements is NOT true about double-replacement reactions?

a. The product may precipitate from solution.

b. The product may be a gas.

c. The product may be a molecular compound.

d. The reactant may be a solid metal.

d. The reactant may be a solid metal.

In a double-replacement reaction, the ____.

a. products are always molecular

b. reactants are two ionic compounds

c. reactants are two elements

d. products are a new element and a new compound

b. reactants are two ionic compounds

In a double-replacement reaction, ____.

a. the reactants are usually a metal and a nonmetal

b. one of the reactants is often water

c. the reactants are generally two ionic compounds in aqueous solution

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

c. the reactants are generally two ionic compounds in aqueous solution

A double-replacement reaction takes place when aqueous Na2 CO3 reacts with aqueous Sn(NO ) . You

would expect one of the products of this reaction to be ____.

a. NaNO3

b. NaSn

c. Sn(CO3)2

d. CNO3

a. NaNO3

A double-replacement reaction takes place when aqueous cobalt(III) chloride reacts with aqueous lithium

hydroxide. One of the products of this reaction is ____.

a. Co(OH)3

b. Co(OH)2

c. LiCo3

d. LiCl3

a. Co(OH)3

What is the driving force in the following reaction?

Ni(NO3)2 (aq) + K2 S(aq) -> NiS(s) 2KNO3 (aq)

a. A gas is formed. c. Ionic compounds are reactants.

b. A precipitate is formed.

c. Ionic compounds are reactants.

d. Ionic compounds are products.

b. A precipitate is formed.