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1) Identify the Bronsted-Lowry acid in the following reaction.
𝐻2𝑂 + 𝐶𝑂3
2− → 𝐻𝐶𝑂3
− + 𝑂𝐻−
A) 𝐶𝑂3
2−
B) 𝐻𝐶𝑂3
−
C) 𝑂𝐻−
D) 𝐻2𝑂
E) 𝐻2𝐶𝑂3
2) An increase in the temperature of a solution usually
A) increases the solubility of a gas in the solution.
B) increases the boiling point.
C) increases the solubility of a solid solute in the solution.
D) decreases the solubility of a liquid solute in the solution.
E) decreases the solubility of a solid solute in the solution.
3) The conjugate acid of 𝐻2𝑂 is ________.
A) 𝐻2𝑂
B) 𝐻
+
C) 𝑂𝐻−
D) 𝐻3𝑂
+
E) 𝐻2𝑂 has no conjugate acid.
4) In ionic compounds, ________ lose their valence electrons to form positively charged ________.
A) metals, anions
B) metals, cations
C) metals, polyatomic ions
D) nonmetals, anions
E) nonmetals, cations
5) Which of the following is NOT a function of proteins?
A ) transport substances through the bloodstream
B) provide structural components
C) stores the genetic information of a living organism
D) movement of muscles
E) catalyse reactions in the cells
6) The ________ is the minimum energy needed for a chemical reaction to begin.
A) activation energy
B) heat of reaction
C) energy of reactants
D) energy of products
E) reaction energy
7) Which of the following is an oxidation-reduction reaction?
A) 𝐴𝑔𝑁𝑂3 + 𝑁𝑎𝐶𝑙 → 𝐴𝑔𝐶𝑙 + 𝑁𝑎𝑁𝑂3
B) 𝐾𝑂𝐻 + 𝐻𝑁𝑂3 → 𝐻2𝑂 + 𝐾𝑁𝑂3
C) 𝐶𝑎𝐶𝑙2 + 𝑁𝑎2𝑆𝑂4 → 𝐶𝑎𝑆𝑂4 + 2𝑁𝑎𝐶𝑙
D) 𝐴𝑙2(𝑆𝑂4)3 + 6𝐾𝑂𝐻 → 2𝐴𝑙(𝑂𝐻)3 + 3𝐾2𝑆𝑂4
8) Which of the following will not be found in DNA?
A) cytosine
B) guanine
C) thymine
D) ribose
E) adenine
9) Consider a neutral atom with 30 protons and 34 neutrons. The atomic number of the element is
A) 32.
B) 94.
C) 34.
D) 64.
E) 30.
10) The functional group contained in the compound 𝐶𝐻3 − 𝐶𝐻2 − 𝑂𝐻 is:
A) an ether.
B) an alcohol.
C) a ketone.
D) an alkene.
E) an aldehyde.
11) A sample of chlorine has two naturally occurring isotopes. The isotope Cl-35 makes up 75.8% of the
sample, and the isotope Cl-37 makes up 24.3% of the sample. Which of the following statements is true?
A) The atomic mass of chlorine will be less than 35.
B) The atomic mass of chlorine will be more than 37.
C) The atomic mass will be 24.3.
D) You cannot tell what the atomic mass will be.
E) The atomic mass will be between 35 and 37.
2) What is the [𝐻3𝑂
+] in a solution with [𝑂𝐻−] = 1 x 10-12 M?
A) 1 x 102 M
B) 1 x 10-7 M
C) 1 x 10-2 M
D) 1 x 10-8 M
E) 1 x 10-12 M
13) A hydrogen bond is
A) a covalent bond between H and O.
B) an attraction between a hydrogen atom attached to N, O, or F and an N, O, or F atom.
C) an ionic bond between H and another atom.
D) the polar O-H bond in water.
E) a bond that is stronger than a covalent bond.
14) In the reaction of nitrogen gas (𝑁2) with hydrogen gas (𝐻2) to form ammonia gas (𝑁𝐻3) how many moles of
hydrogen are needed to react with two moles of nitrogen?
𝑁2 + 3𝐻2 → 2𝑁𝐻3
A) 10 moles
B) 2 moles
C) 4 moles
D) 8 moles
E) 6 moles
15) Complete the following statement: In Charles` law, the volume of a gas ________ when the ________
decreases.
A) increases, temperature
B) increases, quantity of gas
C) decreases, pressure
D) decreases, temperature
6) What is the molarity of a KCl solution made by diluting 75.0 mL of a 0.200 M solution to a final volume of
100. mL?
A) 0.150 M
B) 0.200 M
C) 0.100 M
D) 0.267 M
E) 6.67 M
17) What is oxidized and what is reduced in the following reaction?
2𝐴𝑙 + 3𝐵𝑟2 → 2𝐴𝑙𝐵𝑟3
A) 𝐴𝑙𝐵𝑟3 is reduced and 𝐵𝑟2 is oxidised.
B) 𝐴𝑙𝐵𝑟3 is reduced and Al is oxidised.
C) Al is reduced and 𝐵𝑟2 is oxidised.
D) Al is oxidised and 𝐵𝑟2 is reduced.
E) 𝐴𝑙𝐵𝑟3 is oxidised and Al is reduced.
18) The formation of a gas resulting from the escape of high-energy particles from the surface of a liquid is
known as
A) evaporation.
B) melting.
C) deposition.
D) boiling.
E) sublimation.
19) What elements are in hydroxyapatite, 𝐶𝑎5(𝑃𝑂4)3𝑂𝐻, a major compound in human bones and teeth?
A) carbon, potassium, oxygen, helium
B) calcium, phosphorous, oxygen, hydrogen
C) carbon, potassium, oxygen, hydrogen
D) calcium, phosphorous, oxygen, helium
E) carbon, phosphorous, oxygen, helium
20) A 5.00 L tank contains helium gas at 1.50 atm. What is the pressure of the gas in mm Hg?
A) 507 mm Hg
B) 3800 mm Hg
C) 760 mm Hg
D) 1.50 mm Hg
E) 1140 mm Hg
21) Which of the following examples illustrates a number that is correctly rounded to three significant figures?
A) 4.05438 grams to 4.054 grams
B) 109 526 grams to 109 500 grams
C) 20.0332 grams to 20.0 grams
D) 0.03954 grams to 0.040 grams
E) 103.692 grams to 103.7 grams
22) Which of the following is the correct electron-dot structure for carbon?
21) Which of the following examples illustrates a number that is correctly rounded to three significant figures?
A) 4.05438 grams to 4.054 grams
B) 109 526 grams to 109 500 grams
C) 20.0332 grams to 20.0 grams
D) 0.03954 grams to 0.040 grams
E) 103.692 grams to 103.7 grams
22) Which of the following is the correct electron-dot structure for carbon?
23) A polar covalent bond is found in which of these compounds?
A) 𝐻2𝑂
B) 𝑁2
C) 𝐹2
D) NaCl
E) 𝐻2
24) How many moles of water 𝐻2𝑂, are present in 75.0 g 𝐻2𝑂?
A) 7.50 moles
B) 75.0 moles
C) 4.17 moles
D) 4.41 moles
E) 1.35 x 103 moles
25) Which of the following is NOT part of the kinetic theory of gases?
A) There is very little empty space in a gas.
B) Gas particles move rapidly.
C) A gas is composed of very small particles.
D) Gas particles move faster when the temperature increases.
E) Gas particles do not attract or repel one anothe
