Reaction Reactor Exam
Reaction Reactor
IPC Final Spring Exam
NAME:
DATE:
PERIOD:
Instructions
- Read each question carefully before selecting your answer on your answer record sheet.
- Choose the best answer for all multiple-choice questions.
- For balancing equations in Part IV, use the provided boxes to show your atom counting work.
- Use the diagrams provided in each section to assist you.
Part I
Counting Atoms
H2O
Hydrogen
CO2
Carbon
NaCl
Salt
C6H12O6
Glucose
1. How many hydrogen atoms are in H2O?
A. 1
B. 2
C. 3
D. 4
2. How many oxygen atoms are in CO2?
A. 1
B. 2
C. 3
D. 4
3. How many total atoms are in NaCl?
A. 1
B. 2
C. 3
D. 4
4. How many carbon atoms are in C6H12O6?
A. 3
B. 6
C. 12
D. 24
5. How many total atoms are in H2SO4?
A. 5
B. 6
C. 7
D. 8
6. How many oxygen atoms are in 2H2O?
A. 1
B. 2
C. 3
D. 4
7. How many hydrogen atoms are in 3H2?
A. 2
B. 3
C. 6
D. 9
8. How many atoms are in CH4?
A. 3
B. 4
C. 5
D. 6
9. How many atoms are in 2CO2?
A. 4
B. 5
C. 6
D. 8
10. Which formula contains 2 nitrogen atoms?
A. NH3
B. N2O
C. NO2
D. NaNO3
11. How many oxygen atoms are in Al2(SO4)3?
A. 4
B. 8
C. 12
D. 16
12. How many total atoms are in Ca(OH)2?
A. 3
B. 4
C. 5
D. 6
Part II
Chemical Bonding
Ionic Bonding
Na+ + Cl- → NaCl
Electrons are transferred
Covalent Bonding
H + H → H2
Electrons are shared
13. What type of bond forms when electrons are transferred?
A. Metallic
B. Ionic
C. Covalent
D. Hydrogen
14. What type of bond forms when electrons are shared?
A. Ionic
B. Metallic
C. Covalent
D. Nuclear
15. Sodium chloride (NaCl) is an example of:
A. Covalent
B. Ionic
C. Metallic
D. Hydrogen
16. Water (H2O) contains what type of bond?
A. Ionic
B. Metallic
C. Covalent
D. Nuclear
17. Which particles are involved in bonding?
A. Neutrons
B. Protons
C. Electrons
D. Nucleus
18. Metals tend to:
A. Gain electrons
B. Share electrons
C. Lose electrons
D. Destroy electrons
19. Nonmetals tend to:
A. Lose electrons
B. Gain electrons
C. Melt easily
D. Become neutrons
20. Which compound is covalent?
A. NaCl
B. MgO
C. CO2
D. KBr
21. Which compound is ionic?
A. H2O
B. CO2
C. NaF
D. CH4
22. Which is most likely to form a positive ion?
A. Oxygen
B. Chlorine
C. Sodium
D. Nitrogen
23. Which is most likely to form a negative ion?
A. Magnesium
B. Potassium
C. Calcium
D. Fluorine
24. What do valence electrons determine?
A. Color
B. Atomic mass
C. Bonding
D. Neutrons
25. What type of bond exists in O2?
A. Ionic
B. Covalent
C. Metallic
D. Nuclear
Part III
Chemical Reactions
Synthesis: A + B → AB
Combustion: Fuel + O2 → CO2 + H2O
Decomp: AB → A + B
Single Repl: A + BC → AC + B
Double Repl: AB + CD → AD + CB
26. What is produced during combustion?
A. Salt/Water
B. CO2/Water
C. Oxygen
D. Nitrogen
27. Which type combines substances?
A. Decomp.
B. Combustion
C. Synthesis
D. Replacement
28. Which type breaks apart compounds?
A. Synthesis
B. Decomp.
C. Combustion
D. Neutralize
29. What are starting substances called?
A. Products
B. Solutions
C. Reactants
D. Mixtures
30. What are substances formed called?
A. Products
B. Reactants
C. Solvents
D. Mixtures
31. Which is evidence of a chemical reaction?
A. Color change
B. Gas production
C. Temp change
D. All of these
32. Which type usually involves oxygen gas?
A. Combustion
B. Synthesis
C. Decomp.
D. Replacement
33. Type represented by AB → A + B?
A. Synthesis
B. Decomp.
C. Combustion
D. Single Repl.
34. Type represented by A + B → AB?
A. Combustion
B. Decomp.
C. Synthesis
D. Replacement
35. Zinc replaces copper in CuSO4 is:
A. Single Repl.
B. Double Repl.
C. Combustion
D. Decomp.
36. Which reaction type forms water?
A. Combustion
B. Nuclear
C. Decomp.
D. Synthesis
37. Which is a physical change?
A. Burning
B. Rusting
C. Melting
D. Bubbling
38. Two compounds exchanging ions?
A. Single Repl.
B. Combustion
C. Double Repl.
D. Synthesis
Part IV
Balancing Equations
Law of Conservation of Mass
2H2 + O2 → 2H2O
Atoms must be equal on both sides.
39. Why must equations be balanced?
A. To increase reaction speed
B. Law of Conservation of Mass
C. To remove unused atoms
D. To change the product type
40. __ H2 + __ O2 → __ H2O
A. 1,1,1
B. 2,1,2
C. 1,2,1
D. 2,2,2
41. __ Na + __ Cl2 → __ NaCl
A. 1,1,1
B. 2,1,2
C. 2,2,1
D. 1,2,2
42. __ N2 + __ H2 → __ NH3
A. 1,3,2
B. 2,3,1
C. 1,2,2
D. 3,1,2
43. __ Fe + __ O2 → __ Fe2O3
A. 2,1,2
B. 4,3,2
C. 3,2,1
D. 1,1,1
44. __ C3H8 + __ O2 → __ CO2 + __ H2O
A. 1,5,3,4
B. 1,3,3,4
C. 2,5,3,4
D. 1,4,2,3
45. __ Mg + __ HCl → __ MgCl2 + __ H2
A. 1,2,1,1
B. 2,1,2,1
C. 1,1,1,1
D. 2,2,1,2
46. __ Al + __ O2 → __ Al2O3
A. 2,3,1
B. 4,3,2
C. 1,2,1
D. 3,2,4
47. __ KClO3 → __ KCl + __ O2
A. 2,2,3
B. 1,1,2
C. 3,2,1
D. 2,1,2
48. What number is in front of a formula?
A. Subscript
B. Coefficient
C. Exponent
D. Prefix
49. What should NEVER be changed?
A. Coefficient
B. Product
C. Subscript
D. Reactant
50. Law: matter is not created or destroyed?
A. Gravity
B. Motion
C. Cons. of Mass
D. Thermo.