UCLA Chemistry Review Questions

Final ExamYour grade is determined by your only attempt.
Instructions
1. Which state of matter has a definite volume and shape?
A. Solid
B. Plasma
C. Liquid
D. Gas
2. Which term refers to a solid turning into a liquid?
A. Vaporization
B. Freezing
C. Melting
D. Condensation
3. What is a good example of a physical change?
A. The assembly of thousands of smaller amino acid molecules into one very large protein molecule
B. The melting of iron at extremely high temperatures
C. The breaking apart of a large complex carbohydrate molecule into smaller molecules called simple sugars
D. The formation of bubbles when vinegar and baking soda are placed in the same bowl
4. The particles in which substance will have the greatest amount of translational energy?
A. Hydrogen gas
B. Liquid water
C. Ice
D. Solid gold
5. Which temperature scale is used by most people in the world?
A. The Calorie scale
B. The Fahrenheit scale
C. The Kelvin scale
D. The Celsius scale
6. Which represents the largest unit of energy?
A. The joule
B. The kilojoule
C. The Calorie
D. The calorie
7. Which unit is used to measure length in the metric system of measurement?
A. Meter
B. Inch
C. Liter
D. Gram
8. What would be the approximate mass in grams of a 7.0 pound baby?
A. About 3,200 grams
B. About 3.2 grams
C. About 32,000 grams
D. About 65 grams
9. The specific gravity of bone is about 1.85, of blood is about 1.06, of water is 1.00, and of urine is 1.03 to 1.035. Which substance
contains the fewest particles?
A. Bone
B. Urine
C. Water
D. Blood
10. Which particle is an example of a nucleon?
A. Cation
B. Neutron
C. Electron
D. Anion
11. What is the atomic mass of an atom of carbon with seven neutrons? (Use the Periodic Table to help you with this answer.)
A. 13
B. 6
C. 14
D. 7
12. Which atom has five valence electrons?
A. A helium atom
B. A sodium atom
C. A carbon atom
D. A nitrogen atom
13. Which element is the best conductor of electricity?
A. Sulfur
B. Boron
C. Calcium
D. Silver
14. Which nonmetal is extremely nonreactive, refusing to bond with other elements except under very unusual conditions created in
the laboratory?
A. Xenon
B. Sulfur
C. Oxygen
D. Chlorine
15. Which element has two valence electrons?
A. Calcium
B. Sodium
C. Carbon
D. Iodine
16. How do two atoms of oxygen bind together?
A. They share two pairs of electrons.
B. They form a bond between the negative side of one atom of oxygen and the positive side of another atom of oxygen.
C. One atom of oxygen donates an electron to another atom of oxygen.
D. They share one pair of electrons.
17. What is unique about polar covalent bonds?
A. Electrons are shared unequally between the atoms.
B. Hydrogen bonds
C. The bond is due to an electrical attraction between atoms rather than a sharing of electrons.
D. Electrons are shared equally between the atoms.
18. Which makes a good example of a compound that uses ionic bonds?
A. Ammonia (NH3)
B. Sodium chloride (NaCl)
C. Methane (CH4)
D. Water (H2O)
19. Which substance is a product in the following equation: SO3 + H2O → H2(SO4)?
A. SO4
B. H2(SO4)
C. H2O
D. SO3
20. What type of equation is the following equation: 2KI + Pb(NO3)2 → 2KNO3 + PbI2?
A. A single-replacement reaction
B. Synthesis reaction
C. A double-replacement reaction
D. A decomposition reaction
21. Which equation is written correctly?
A. Na + Zn(SO4) → Na2(SO4) + Zn
B. 4Fe + 3O2 → 2Fe2O3
C. 2Fe + 3CO2 → 3Fe2O3 + 3C
D. 2NH3 + 3O2 → 2N2 + 6H2O
22. What is an example of an endothermic reaction?
A. Any reaction where the chemical bonds in the reactants contain more energy than the chemical bonds in the products
B. The combustion of coal dust when exposed to a spark
C. The reaction between glucose and oxygen molecules
D. Photosynthesis
23. How does the concentration of the reactants affect the speed of a chemical reaction?
A. Increasing the concentration of the reactants will slow down the speed of a chemical reaction.
B. Changing the concentration of the reactants won’t have any effect on the speed of a chemical reaction.
C. Increasing the concentration of the reactants will increase the speed of a chemical reaction.
D. Lowering the concentration of the reactants will increase the speed of a chemical reaction.
24. What is one way that catalysts work to increase the speed of a chemical reaction?
A. They lower the pressure of any gaseous reactants.
B. They hold the reactants in the proper orientation.
C. The catalyst reacts with a reactant and becomes an entirely new chemical when the reaction is over.
D. They lower the temperature of the reactants.
25. How can you know the amount of grams in a mole of an element?
A. Look at the periodic table for that element’s atomic number and change the units to grams.
B. Multiply the atomic mass of an element by Avogadro’s number.
C. Look at the periodic table for that element’s atomic mass and divide by Avogadro’s number.
D. Look at the Periodic Table for that element’s atomic mass and change the units to grams.
26. How many moles of aluminum oxide (Al2O3) are formed in the reaction Fe2O3 + 2Al → Al2O3 + 2Fe?
A. Five
B. One
C. Three
D. Two
27. Which balanced chemical equation represents cellular respiration of a molecule of glucose?
A. C6H12O6 + 6O2 → 6CO2 + 6H2O + energy
B. C6H12O6 + O2 → CO2 + H2O + energy
C. 6CO2 + 6H2O + energy → C6H12O6 + 6O2
D. C3H8 + 5O2 → 3CO2 + 4H2O
28. What type of mixture contains the smallest particles?
A. A heterogeneous mixture
B. A colloid
C. A suspension
D. A solution.
29. Why is it hard to dissolve silver chloride (AgCl) in water?
A. The attraction between hydrogen bonds is too strong for the water molecules to break apart.
B. The solute-solute attraction between the silver ions and chloride ions is very strong and hard to break.
C. Silver chloride is nonpolar.
D. The solute-solute attraction between the silver ions and chloride ions is very weak.
30. Which solution of gas dissolved in water can contain the most gas molecules?
A. A can of warm soda under low pressure
B. A can of cold soda under low pressure
C. A can of cold soda under high pressure
D. A can of warm soda under high pressure
31. What type of substance releases positively charged hydrogen ions when placed in water?
A. Buffer
B. Acid
C. Base
D. Salt
32. What will your body do if you get too alkaline?
A. Excrete fewer hydrogen ions in your urine
B. Bind hydrogen ions with carbonate ions to form carbonic acid
C. Excrete more hydrogen ions in your urine
D. Increase the depth and rate of your breathing
33. Which chemical is deficient in the condition called hypokalemia?
A. Sodium
B. Calcium
C. Potassium
D. Iron
34. What is an example of a monosaccharide?
A. Cellulose
B. Glycogen
C. Fructose
D. Sucrose
35. Which lipid molecules are formed from a glycerol molecule and three fatty acid chains?
A. Testosterone molecules
B. Phospholipids
C. Cholesterol molecules
D. Triglycerides
36. What is an important function of proteins in the body?
A. Speed up chemical reactions
B. Serve as your body’s primary source of energy
C. Provide insulation under the skin
D. Contain the genetic code that tells your body how to build structures and chemicals
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