1) A borane is a ________.
A) compound containing only boron and oxygen
B) compound containing only boron and aluminum
C) compound containing only boron and hydrogen
D) compound containing only boron and carbon
E) three-dimensional covalent network of boron atoms
2) The kinetic energy of a 23.2-g object moving at a speed of 98.7 m/s is ________ J.
A) 145
B) 113
C) 1450
D) 0.950
E) 113000
3) The coordination numbers of cobalt (III) and of chromium (III) in their complexes
are always ________.
A) 4
B) 5
C) 2
D) 3
E) 6
4) Of the following metals, ________ exhibits multiple oxidation states.
A) Ni
B) K
C) Ca
D) Al
E) Sr
5) The only noble gas without eight valence electrons is ________.
A) Ar
B) Ne
C) He
D) Kr
E) All noble gases have eight valence electrons.
6) What is the correct formula for ammonium sulfide?
A) NH4SO3
B) (NH4)2SO4
C) (NH4)2S
D) NH3S
E) N2S3
7) How many milliliters of a stock solution of 11.7 M HNO3 would be needed to
prepare 0.500 L of 0.500 M HNO3?
A) 0.0468
B) 21.4
C) 2.93
D) 46.8
E) 0.0214
8) The formula weight of PbCO3 is ________ amu.
A) 279.2
B) 112.0
C) 118.0
D) 267.2
E) 235.2
9) Incomplete combustion of carbon-containing materials occurs when ________.
A) there is insufficient oxygen to convert all of the carbon to carbon dioxide
B) there are sulfur impurities in the carbon-containing material
C) the carbon-containing material is a gas
D) the combustion flame is too hot
E) there is an excess of oxygen
10) What is the coordination number of chromium in [Cr(H2O)4Cl2]+?
A) 8
B) 6
C) 4
D) 2
E) 12
11) What is the molecular formula for 1-propanol?
A) CH4O
B) C2H6O
C) C3H8O
D) C4H10O
E) C5H12O
12) Interhalogen compounds ________.
A) are exceedingly reactive
B) contain halogens in both positive and negative oxidation states
C) are powerful oxidizing agents
D) that contain fluorine are very active fluorinating agents
E) all of the above
13) Which gaseous sulfur compound combines with water to form the principal acidic
constituent of acid rain?
A) H2SO4
B) SO2
C) SO
D) SO3
E) H2S
14) Which one of the following processes results in an increase in the atomic number?
A) gamma emission
B) positron emission
C) beta emission
D) alpha emission
E) corrosion
15) The interhalogen compound ICl3 can form but BrCl3 cannot form. This is because
________.
A) iodine is large enough to accommodate three chlorine atoms around itself
B) bromine is not electronegative enough to react with chlorine
C) bromine is too electronegative to react with chlorine
D) iodine can have a positive oxidation state but bromine cannot
E) iodine can have a negative oxidation state but bromine cannot
16) Which solution has the same number of moles of NaOH as 50.0 mL of 0.100 M
solution of NaOH?
A) 20.0 mL of 0.200 M solution of NaOH
B) 25.0 mL of 0.175 M solution of NaOH
C) 30.0 mL of 0.145 M solution of NaOH
D) 50.0 mL of 0.125 M solution of NaOH
E) 100.0 mL of 0.0500 M solution of NaOH
17) The product of the nuclear reaction in which 28Si is subjected to neutron capture
followed by alpha emission is ________.
A) 31S
B) 33S
C) 23Mg
D) 25Mg
E) 25Al
18) Of the three types of radioactivity characterized by Rutherford, which is/are
electrically charged?
A) ²-rays
B) ±-rays and ²-rays
C) ±-rays, ²-rays, and ³-rays
D) ±-rays
E) ±-rays and ³-rays
19) When the following equation is balanced, the coefficient of water is ________.
N2O5 (g) + H2O (l) → HNO3 (aq)
A) 5
B) 2
C) 3
D) 4
E) 1
20) Of the following, ________ is an exothermic process.
A) melting
B) subliming
C) freezing
D) boiling
E) All of the above are exothermic.