STRAIGHTERLINE CHEMISTRY COMPREHENSIVE
ALL QUESTIONS AND ANSWERS SURE A+
✔✔What is the name given to a solution that contains less solute than it has the
capacity to dissolve?
Select one:
a. Unsaturated
b. Saturated
c. Solvented
d. Oversaturated
e. Supersaturated - ✔✔a. Unsaturated
✔✔An emulsion is a dispersion consisting of a
Select one:
a. solid in a liquid.
b. liquid in a liquid.
c. gas in a liquid.
d. liquid in a solid.
e. gas in a solid. - ✔✔b. liquid in a liquid.
✔✔Which is true regarding the solvation of a solute in a solvent?
Select one:
,a. Separation of solute molecules from one another is an endothermic process, and
separation of solvent molecules from one another is an exothermic process.
b. Separation of solute molecules from one another is an exothermic process, and
separation of solvent molecules from one another is an endothermic process.
c. Separation of solute molecules from one another, and separation of solvent
molecules from one another, are both endothermic processes.
d. Separation of solute molecules from one another, and separation of solvent
molecules from one another, are both exothermic processes.
e. Separation of solute molecules from one another, and separation of solvent
molecules from one another, both result in a decrease in entropy. - ✔✔b. Separation of
solute molecules from one another is an exothermic process, and separation of solvent
molecules from one another is an endothermic process.
✔✔What name is given to a minor component in a solution?
Select one:
a. Solvent
b. Unsaturated
c. Saturated
d. Solute
e. Supersaturated - ✔✔d. Solute
✔✔Which compound has the lowest solubility in pure water?
Select one:
a. Ag2C2O4, Ksp = 1.0 × 10-11
b. PbCl2, Ksp = 1.7 × 10-5
c. FePO4, Ksp = 1.3 × 10-22
d. Ca3(PO4)2, Ksp = 1.2 × 10-26
e. MgF2, Ksp = 6.9 × 10-9 - ✔✔c. FePO4, Ksp = 1.3 × 10-22
✔✔What happens to the solution if sodium acetate is added to a solution of acetic acid?
CH3COOH(aq) Picture H+(aq) + CH3COO-(aq)
Select one:
a. The equilibrium shifts to the right.
b. There is an increase in percent ionization of acetic acid.
c. Less of hydrogen ion is consumed.
d. There is an increased concentration of acetate ions.
e. Less of the acetate ion is consumed. - ✔✔d. There is an increased concentration of
acetate ions.
✔✔Which is more soluble in an acidic solution than in pure water?
Select one:
a. CuI
b. PbCl2
c. Ca3(PO4)2
d. NaNO3
,e. NaBr - ✔✔c. Ca3(PO4)2
✔✔What is the name of the principle of selective precipitation used to identify the types
of ions present in a solution?
Select one:
a. Ionization
b. Selective ion precipitation
c. Selective ion typing
d. Limited precipitation
e. Qualitative analysis - ✔✔e. Qualitative analysis
✔✔Methyl red is a common acid-base indicator. It has a Ka equal to 6.3 × 10-6. Its un-
ionized form is red and its anionic form is yellow. What color would a methyl red solution
have at pH = 7.8?
Select one:
a. green
b. red
c. blue
d. yellow
e. violet - ✔✔d. yellow
✔✔When a strong acid is titrated with a weak base, the pH at the equivalence point
Select one:
a. is greater than 7.0.
b. is equal to 7.0.
c. is less than 7.0.
d. is equal to the pKa of the conjugate acid.
e. is equal to the pKb of the base. - ✔✔c. is less than 7.0.
✔✔Which is necessary for a process to be spontaneous?
Select one:
a. ΔHsys < 0
b. ΔSsys > 0
c. ΔSsurr < 0
d. ΔSuniv > 0
e. ΔGsys = 0 - ✔✔d. ΔSuniv > 0
✔✔As the molar mass of a compound increases, the entropy ______.
Select one:
a. decreases
b. is constant
c. increases - ✔✔c. increases
✔✔The most probable state is the one with the _______.
Select one:
, a. highest energy
b. largest number of possible arrangements
c. lowest number of possible arrangements
d. most symmetry
e. highest enthalpy - ✔✔b. largest number of possible arrangements
✔✔A spontaneous endothermic reaction always
Select one:
a. causes the surroundings to get colder.
b. bursts into flame.
c. requires a spark to initiate it.
d. releases heat to the surroundings. - ✔✔a. causes the surroundings to get colder.
✔✔Which of the following is used to image the brain?
Select one:
a. 18O
b. 131I
c. 123I
d. 24Na
e. 99Tc - ✔✔c. 123I
✔✔Which of the following is an advantage of nuclear power plants over coal-burning
plants? Nuclear power plants
Select one:
a. form numerous radioactive fission products.
b. do not pollute the air with SO2, soot, and fly-ash. Correct
c. produce more thermal pollution than coal plants.
d. use more fuel. - ✔✔b. do not pollute the air with SO2, soot, and fly-ash.
✔✔Which isotope, when bombarded with nitrogen-15, yields four neutrons and the
artificial isotope dubnium-260?
Select one:
a. Californium-245
b. Thorium-257
c. Nobelium-245
d. Californium-249
e. Dubnium-249 - ✔✔d. Californium-249
✔✔Which isotope, when bombarded with bismuth-209, would yield two neutrons and an
isotope with atomic number 121 and mass number 299?
Select one:
a. Pb-211
b. Po-209
c. Sr-92
ALL QUESTIONS AND ANSWERS SURE A+
✔✔What is the name given to a solution that contains less solute than it has the
capacity to dissolve?
Select one:
a. Unsaturated
b. Saturated
c. Solvented
d. Oversaturated
e. Supersaturated - ✔✔a. Unsaturated
✔✔An emulsion is a dispersion consisting of a
Select one:
a. solid in a liquid.
b. liquid in a liquid.
c. gas in a liquid.
d. liquid in a solid.
e. gas in a solid. - ✔✔b. liquid in a liquid.
✔✔Which is true regarding the solvation of a solute in a solvent?
Select one:
,a. Separation of solute molecules from one another is an endothermic process, and
separation of solvent molecules from one another is an exothermic process.
b. Separation of solute molecules from one another is an exothermic process, and
separation of solvent molecules from one another is an endothermic process.
c. Separation of solute molecules from one another, and separation of solvent
molecules from one another, are both endothermic processes.
d. Separation of solute molecules from one another, and separation of solvent
molecules from one another, are both exothermic processes.
e. Separation of solute molecules from one another, and separation of solvent
molecules from one another, both result in a decrease in entropy. - ✔✔b. Separation of
solute molecules from one another is an exothermic process, and separation of solvent
molecules from one another is an endothermic process.
✔✔What name is given to a minor component in a solution?
Select one:
a. Solvent
b. Unsaturated
c. Saturated
d. Solute
e. Supersaturated - ✔✔d. Solute
✔✔Which compound has the lowest solubility in pure water?
Select one:
a. Ag2C2O4, Ksp = 1.0 × 10-11
b. PbCl2, Ksp = 1.7 × 10-5
c. FePO4, Ksp = 1.3 × 10-22
d. Ca3(PO4)2, Ksp = 1.2 × 10-26
e. MgF2, Ksp = 6.9 × 10-9 - ✔✔c. FePO4, Ksp = 1.3 × 10-22
✔✔What happens to the solution if sodium acetate is added to a solution of acetic acid?
CH3COOH(aq) Picture H+(aq) + CH3COO-(aq)
Select one:
a. The equilibrium shifts to the right.
b. There is an increase in percent ionization of acetic acid.
c. Less of hydrogen ion is consumed.
d. There is an increased concentration of acetate ions.
e. Less of the acetate ion is consumed. - ✔✔d. There is an increased concentration of
acetate ions.
✔✔Which is more soluble in an acidic solution than in pure water?
Select one:
a. CuI
b. PbCl2
c. Ca3(PO4)2
d. NaNO3
,e. NaBr - ✔✔c. Ca3(PO4)2
✔✔What is the name of the principle of selective precipitation used to identify the types
of ions present in a solution?
Select one:
a. Ionization
b. Selective ion precipitation
c. Selective ion typing
d. Limited precipitation
e. Qualitative analysis - ✔✔e. Qualitative analysis
✔✔Methyl red is a common acid-base indicator. It has a Ka equal to 6.3 × 10-6. Its un-
ionized form is red and its anionic form is yellow. What color would a methyl red solution
have at pH = 7.8?
Select one:
a. green
b. red
c. blue
d. yellow
e. violet - ✔✔d. yellow
✔✔When a strong acid is titrated with a weak base, the pH at the equivalence point
Select one:
a. is greater than 7.0.
b. is equal to 7.0.
c. is less than 7.0.
d. is equal to the pKa of the conjugate acid.
e. is equal to the pKb of the base. - ✔✔c. is less than 7.0.
✔✔Which is necessary for a process to be spontaneous?
Select one:
a. ΔHsys < 0
b. ΔSsys > 0
c. ΔSsurr < 0
d. ΔSuniv > 0
e. ΔGsys = 0 - ✔✔d. ΔSuniv > 0
✔✔As the molar mass of a compound increases, the entropy ______.
Select one:
a. decreases
b. is constant
c. increases - ✔✔c. increases
✔✔The most probable state is the one with the _______.
Select one:
, a. highest energy
b. largest number of possible arrangements
c. lowest number of possible arrangements
d. most symmetry
e. highest enthalpy - ✔✔b. largest number of possible arrangements
✔✔A spontaneous endothermic reaction always
Select one:
a. causes the surroundings to get colder.
b. bursts into flame.
c. requires a spark to initiate it.
d. releases heat to the surroundings. - ✔✔a. causes the surroundings to get colder.
✔✔Which of the following is used to image the brain?
Select one:
a. 18O
b. 131I
c. 123I
d. 24Na
e. 99Tc - ✔✔c. 123I
✔✔Which of the following is an advantage of nuclear power plants over coal-burning
plants? Nuclear power plants
Select one:
a. form numerous radioactive fission products.
b. do not pollute the air with SO2, soot, and fly-ash. Correct
c. produce more thermal pollution than coal plants.
d. use more fuel. - ✔✔b. do not pollute the air with SO2, soot, and fly-ash.
✔✔Which isotope, when bombarded with nitrogen-15, yields four neutrons and the
artificial isotope dubnium-260?
Select one:
a. Californium-245
b. Thorium-257
c. Nobelium-245
d. Californium-249
e. Dubnium-249 - ✔✔d. Californium-249
✔✔Which isotope, when bombarded with bismuth-209, would yield two neutrons and an
isotope with atomic number 121 and mass number 299?
Select one:
a. Pb-211
b. Po-209
c. Sr-92
