Chapter 6 and 7 Practice MC
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
1) Ammonium fluoride is considered which of the following?
A) molecular compound
B) ionic compound
C) atomic element
D) molecular element
E) none of the above
1)
2) Which molecule listed below is a polar molecule?
A) NH3
2)
B) HCN
C) H2 O
D) all of the compounds
E) none of the compounds
3) Oxidation typically involves:
A) the gain of electrons.
B) the loss of oxygen.
C) the loss of electrons.
D) the gain of water.
E) none of the above
3)
4) A 15.5 gram sample of diphosphorous pentoxide contains how many grams of phosphorous?
A) 6.76
B) 13.5
C) 3.38
D) 1.69
E) none of the above
4)
5) Which of the following statements are TRUE about the BF3 molecule?
5)
A) BF3 has a trigonal planar molecular geometry.
B) BF3 is nonpolar.
C) BF3 violates the octet rule for the central atom.
D) All of the above statements are true.
E) None of the above are true.
6) How many moles of Cu are in 1.48 × 1025 Cu atoms?
A) 0.0408
B) 6.022 × 1023
C) 1.54 × 1025
D) 24.6
E) none of the above
1
6)
7) Which of the following is an example of a combination reaction?
A) 2 Na + Cl2 2NaCl
B) Mg + HCl H2 + MgCl2
C) KClO3 KCl + O2
D) HCl + NaOH NaCl + H2 O
7)
8) Carbon monoxide is considered which of the following?
A) molecular element
B) atomic element
C) ionic compound
D) molecular compound
E) none of the above
8)
9) Reduction typically involves:
A) the gain of electrons.
B) the gain of oxygen.
C) the loss of electrons.
D) the gain of water.
E) none of the above
9)
10) What is the molecular geometry if you have a double bond, a single bond and 1 lone pair around
the central atom?
A) bent
B) linear
C) tetrahedral
D) trigonal pyramidal
E) not enough information
10)
11) What is the molecular geometry if you have 3 single bonds and 1 lone pair around the central
atom?
A) bent
B) linear
C) tetrahedral
D) trigonal pyramidal
E) not enough information
11)
12) The charge of a vanadium ion in the compound V2 O5 is:
12)
13) Determine the theoretical yield of C when 3 units of A and 10 units of B are reacted in the following
generic chemical equation: 2A + 5B 4C.
A) 8
B) 3
C) 6
D) 4
E) none of the above
13)
A) 2+
B) 10C) 5+
D) 10+
E) none of the above
2
14) Nonpolar molecules may exhibit ________.
A) hydrogen bonding
C) London forces
B) dipolar forces
D) all of the above
14)
15) One mole of oxygen gas has a mass of ________ g.
A) 32.0
B) 16.0
C) 8
D) 6.022 × 1023
15)
16) Which of the following reactions is a single replacement reaction?
A) KClO3 KCl + O2
B) HCl + NaOH NaCl + H2 O
C) CaCl2 + H2 O CaCl2 · 2H2 O
D) Mg + HCl H2 + MgCl2
16)
17) Which of the following reactions is a double replacement reaction?
A) KClO3 KCl + O2
B) CaC12 + H2 O CaCl2 · 2H2 O
C) Mg + HCl H2 + MgCl2
D) HCl + NaOH NaCl + H2 O
17)
18) Any reaction that absorbs 150 kilojoules of energy can be classified as
A) exothermic.
B) activated.
C) oxidation.
D) reduction.
E) endothermic.
18)
19) In comparing a balloon containing 25 grams of helium to a balloon containing 25 grams of neon,
which one of the following statements is TRUE?
A) The neon balloon has more atoms.
B) Each balloon has an equal number of atoms.
C) This scenario cannot happen because gases have no mass.
D) The helium balloon has more atoms.
E) none of the above
19)
20) The name trisodium phosphate is incorrect for the compound Na 3 PO4 because:
20)
21) The electronegativity value for Mg is 1.2 and the value for O is 3.5. Based on these values, what
type of bond is expected for a compound formed between Mg and O?
A) ionic
B) polar covalent
C) pure covalent
D) not enough information
E) none of the above
21)
E) none of the above
A) this compound should be called trisodium monophosphate.
B) the sodium has a negative 3 charge.
C) you cannot use a prefix for the first element of an ionic compound.
D) you cannot use a prefix for the first element in a molecular compound.
E) none of the above
3
22) Which formula shown is incorrect for the name given?
A) magnesium nitrite: Mg(NO2 )3
22)
B) sodium hydrogen carbonate: NaHCO3
C) calcium carbonate: CaCO3
D) potassium hydroxide: KOH
E) aluminum sulfate: Al2 (SO4 )3
23) Which molecule listed below is a nonpolar molecule?
A) CO2
23)
B) CCl4
C) BH3
D) all of the compounds
E) none of the compounds
24) What is the correct formula for potassium dichromate?
A) K2 Cr2 O7
24)
B) KCr2 O7
C) K2 CrO4
D) K(CrO4 )2
E) none of the above
25) What are the coefficients for the following reaction when it is properly balanced?
___potassium iodide + ___lead (II) acetate
25)
___lead (II) iodide +___potassium acetate
A) 3, 2, 2, 1
B) 2, 1, 1, 1
C) 1, 1, 2, 2
D) 2, 1, 1, 2
E) none of the above
26) A reaction that releases energy as it occurs is classified as a(n)
A) exothermic reaction.
B) oxidation-reduction reaction.
C) endothermic reaction.
D) catalyzed reaction.
E) decomposition reaction.
26)
27) The strongest interactions between molecules of hydrogen chloride are
A) dipole-dipole interactions.
B) dispersion forces.
C) covalent bonds.
D) hydrogen bonds.
E) ionic bonds.
27)
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28) The electronegativity value for N is 3.0 and that for O is 3.5. Based on these values, which of the
following statements is TRUE about the compound NO?
A) NO is a pure covalent compound.
B) NO is an ionic compound.
C) NO is a polar covalent compound.
D) There is not enough enough information to determine the nature of NO.
E) None of the above statements is true.
28)
29) Which of the following statements is FALSE?
Actual Yield
× 100%.
A) The percent yield =
Theoretical Yield
29)
B) The limiting reactant is completely consumed in a chemical reaction.
C) The theoretical yield is the amount of product that can be made based on the amount of
limiting reagent.
D) The actual yield is the amount of product actually produced by a chemical reaction.
E) All of the above are true statements.
30) What is the sum of all coefficients after the following equation is balanced?
K2 CrO4 + Al(NO3 )3 Al2 (Cr O4 )3 + KNO3
A) 15
B) 8
C) 12
30)
D) 4
31) How many atoms are in 1.50 moles of fluorine gas?
A) 1.81 × 1024
31)
B) 6.022 × 1023
C) 9.03 × 1023
D) 18.98
E) none of the above
32) How many moles of H2 can be made from complete reaction of 3.0 moles of Al?
Given: 2 Al + 6 HCl
32)
2 AlCl3 + 3 H2
A) 3.0 moles
B) 9.0 moles
C) 3 moles
D) 4.5 moles
E) none of the above
33) What is the molar mass of aluminum sulfate?
A) 278.0 g/mol
B) 342.2 g/mol
C) 123.0 g/mol
D) 315.2 g/mol
E) 306.2 g/mol
33)
34) Which among the following elements does NOT exist as a diatomic molecule in nature?
A) neon
B) hydrogen
C) fluorine
D) nitrogen
E) none of the above
34)
5
35) Which of the following chemical substances would you expect to exhibit hydrogen bonding?
A) NH3
B) HF
C) CH3 OH
D) all of the above
35)
36) Which of the following reactions is a decomposition reaction?
A) CaCl2 + H2 O CaCl2 · 2H2 O
B) KClO3 KCl + O2
C) HCl + NaOH NaCl + H2 O
D) Mg + HCl H2 + MgCl2
36)
37) What would the formula of diiodine pentasulfide be?
A) I2 S7
37)
B) I5 S2
C) I4 S9
D) I2 S5
E) none of the above
38) How many atoms are in 15.6 grams of silicon?
A) 0.555
B) 2.64 × 1026
38)
39) The theoretical yield of a reaction is 75.0 grams of product and the actual yield is 42.0g. What is the
percent yield?
A) 178
B) 56.0
C) 75.0
D) 31.5
E) none of the above
39)
40) What is the molecular geometry of SCl2 ?
40)
C) 3.34 × 1023
D) 438
E) none of the above
A) bent
B) linear
C) tetrahedral
D) trigonal pyramidal
E) not enough information
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Answer Key
Testname: CH 6 & 7 PRACTICE MC
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B
D
C
A
D
D
A
D
A
A
D
C
C
C
A
D
D
E
D
C
A
A
D
A
D
A
A
C
E
C
A
D
B
A
D
B
D
C
B
A
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