Chapter 24 Practice Test

Question 1

In which of the following compounds would you expect to find only polar covalent bonds?

Answer 1

PBr3

Question 2

Complete the following analogy:

Ammonia : phosphine :: methane : _________________

Answer 2

Silane

Question 3

Which of these compounds contains only sigma (σ) bonds?

Answer 3

S8

Question 4

Which reaction shows how hydrogen is formed in the water-gas shift reaction?

Answer 4

CO + H2O —> CO2 + H2

Question 5

Which is not a binary hydride?

Answer 5

OH-

Question 6

What is the product of the Haber-Bosch process?

Answer 6

NH3(g)

Question 7

What is the common name of the carbonate salt, Na2CO3?

Answer 7

Washing soda

Question 8

Which of the following is not an allotrope of carbon?

Answer 8

Cyanide

Question 9

How many carbon atoms comprise a buckminsterfullerene?

Answer 9

60

Question 10

How many carbon atoms comprise a buckminsterfullerene?

Answer 10

27.7%

Question 11

Which percentage of the mass of the earth’s crust is composed of oxygen?

Answer 11

46.4%

Question 12

Identify and arrange in the correct order the steps involved in the process of producing nitric acid using the Ostwald method.

1. 2NO + O2 → 2NO2
2. 4NH3 + 5O2 → 4NO + 6H2O
3. 3NO2 + 3H2O → 2HNO3 + NO
4. NH3 + 2O2 → HNO3 + H2O

Answer 12

2, 1, 3

Question 13

Ammonium nitrite decomposes upon heating into nitrogen gas and water. How much nitrogen gas is produced when 3.00 grams of solid ammonium nitrite is heated at 235°C and 1.10 atm?

Answer 13

1.78 L

Question 14

Which compound contains phosphorus in the +3 oxidation state?

Answer 14

H3PO3

Question 15

Which of the following Group 15 (VA) elements is NEVER found uncombined in nature?

Answer 15

P

Question 16

Arrange the following binary oxides in order of increasing covalent character:

Oxides: SO2, MgO, PbO2, and F2O

Answer 16

MgO < PbO2 < SO2 < F2O

Question 17

Oxygen typically reacts with nonmetals to form oxides that are acidic in water. Which of the following nonmetal oxides does not act as an acid in water?

Answer 17

N2O

Question 18

Nitrogen and oxygen form diatomic molecules. What type of molecules does sulfur usually form?

Answer 18

Polyatomic

Question 19

Why does sulfuric acid form both sulfates and bisulfates?

Answer 19

The second dissociation of sulfuric acid is not complete.

Question 20

Which halogen is most reactive?

Answer 20

Fluorine

Question 21

Which of the following is not a property of the halogens?

Answer 21

Valence configuration of ns2np3

Question 22

Although HF is a weak acid, it is commercially important because it is one of very few substances that will react with _____.

Answer 22

glass

Question 23

Which is a balanced equation for the production of chlorine gas?

Answer 23

2NaCl(aq) + 2H2O(l) → 2NaOH(aq) + H2(g) + Cl2(g)

Question 24

Which of the following is TRUE regarding xenon oxyfluorides?

Answer 24

They are unstable.

Question 25

What noble gas is produced by alpha decay?

Answer 25

Helium