1) In the generation of most anions, the energy change (kJ/mol) that _______ an
electron is ________.
A) removes, positive
B) adds, positive
C) removes, negative
D) adds, negative
E) None of the above is correct.
2) On a phase diagram, the melting point is the same as ________.
A) the triple point
B) the critical point
C) the freezing point
D) the boiling point
E) the vapor-pressure curve
3) In comparing the same two atoms bonded together, the ________ the bond order, the
________ the bond length, and the ________ the bond energy.
A) greater, shorter, greater
B) greater, greater, greater
C) greater, longer, greater
D) greater, greater, smaller
E) smaller, greater, greater
4) Which one of the following is the weakest acid?
A) HF (Ka = 6.8 x 10-4)
B) HClO (Ka = 3.0 x 10-8)
C) HNO2 (Ka = 4.5 x 10-4)
D) HCN (Ka = 4.9 x 10-10)
E) Acetic acid (Ka = 1.8 x 10-5)
5) The concentration of Br– in a sample of seawater is 5.3 10-4 M. If a liter of seawater
has a mass of 1.0 kg, the concentration of Br– is ________ ppm.
A) 0.042
B) 42
C) 0.53
D) 5.3
E) 0.0053
6) A separation process that depends on differing abilities of substances to form gases is
called ________.
A) filtration
B) solvation
C) distillation
D) chromatography
E) All of the above are correct.
7) The ________ ion is represented by the electron configuration [Ar]3d2.
A) Cr4+
B) V4+
C) Ti4+
D) Mn4+
E) Sc4+
8) Dynamite consists of nitroglycerine mixed with ________.
A) potassium nitrate
B) damp KOH
C) TNT
D) diatomaceous earth or cellulose
E) solid carbon
9) Which equation correctly represents the first ionization of copper?
A) Cu(g) → Cu+(g) + e–
B) Cu+(g) → Cu2+(g) + e–
C) Cu(g) → Cu–(g) + e–
D) Cu+(g) + e– → Cu(g)
E) Cu2+(g) → Cu3+(g) + e–
10) There are ________ atoms of oxygen in 300 molecules of CH3CO2H.
A) 300
B) 600
C) 150
D) 3.6 x 1026
E) 1.0 x 10-22
11) To produce carbon black, ________.
A) diamond is exposed to extremely high pressures and temperatures
B) wood is strongly heated in the absence of oxygen
C) coal is strongly heated in the absence of oxygen
D) hydrocarbons such as methane are heated in a very limited supply of oxygen
E) graphite is cooled to -273 °C