Q. What is the effect of increasing temperature on the kinetic energy of gas particles?
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A.
It decreases kinetic energy.
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B.
It has no effect.
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C.
It increases kinetic energy.
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D.
It causes phase change.
Solution
Increasing temperature increases the kinetic energy of gas particles.
Correct Answer: C — It increases kinetic energy.
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Q. What is the effect of increasing temperature on the kinetic energy of particles in a substance?
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A.
Kinetic energy decreases
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B.
Kinetic energy remains constant
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C.
Kinetic energy increases
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D.
Kinetic energy fluctuates
Solution
Increasing temperature increases the kinetic energy of particles in a substance.
Correct Answer: C — Kinetic energy increases
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Q. What is the effect of increasing temperature on the pressure of a gas at constant volume?
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A.
Pressure decreases
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B.
Pressure remains constant
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C.
Pressure increases
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D.
Pressure fluctuates
Solution
According to Gay-Lussac's law, pressure increases with temperature at constant volume.
Correct Answer: C — Pressure increases
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Q. What is the effect of increasing temperature on the rate of a chemical reaction?
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A.
Decreases the rate
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B.
Increases the rate
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C.
No effect
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D.
Depends on the reaction
Solution
Increasing temperature generally increases the rate of a chemical reaction.
Correct Answer: B — Increases the rate
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Q. What is the effect of increasing temperature on the solubility of most solid solutes in water?
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A.
Increases solubility
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B.
Decreases solubility
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C.
No effect
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D.
Depends on the solute
Solution
For most solid solutes, increasing temperature increases solubility in water.
Correct Answer: A — Increases solubility
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Q. What is the effect of increasing temperature on the vapor pressure of a liquid?
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A.
It decreases
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B.
It remains constant
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C.
It increases
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D.
It fluctuates
Solution
Increasing temperature increases the kinetic energy of the molecules, leading to an increase in vapor pressure.
Correct Answer: C — It increases
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Q. What is the effect of increasing temperature on the vapor pressure of a solution?
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A.
It decreases the vapor pressure.
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B.
It increases the vapor pressure.
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C.
It has no effect.
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D.
It causes the vapor pressure to become zero.
Solution
Increasing temperature generally increases the vapor pressure of a solution due to increased kinetic energy of the molecules.
Correct Answer: B — It increases the vapor pressure.
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Q. What is the effect of increasing temperature on the vapor pressure of a solvent according to Raoult's Law?
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A.
It decreases the vapor pressure.
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B.
It increases the vapor pressure.
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C.
It has no effect.
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D.
It depends on the solute.
Solution
Increasing temperature generally increases the vapor pressure of a solvent, as more molecules have enough energy to escape into the vapor phase.
Correct Answer: B — It increases the vapor pressure.
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Q. What is the effect of increasing temperature on the viscosity of a liquid?
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A.
Increases viscosity
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B.
Decreases viscosity
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C.
No effect
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D.
Depends on the liquid
Solution
Increasing temperature generally decreases the viscosity of a liquid.
Correct Answer: B — Decreases viscosity
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Q. What is the effect of increasing the concentration of a reactant in a first-order reaction?
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A.
Rate increases linearly
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B.
Rate decreases
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C.
Rate remains constant
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D.
Rate increases exponentially
Solution
In a first-order reaction, increasing the concentration of a reactant results in a linear increase in the rate.
Correct Answer: A — Rate increases linearly
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Q. What is the effect of increasing the concentration of a solute on the freezing point of a solution?
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A.
Freezing point increases
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B.
Freezing point decreases
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C.
No effect
-
D.
Depends on the solute
Solution
Increasing the concentration of a solute lowers the freezing point of a solution.
Correct Answer: B — Freezing point decreases
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Q. What is the effect of increasing the concentration of reactants on the rate of a reaction?
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A.
Rate decreases
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B.
Rate increases
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C.
Rate remains constant
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D.
Rate becomes zero
Solution
Increasing the concentration of reactants generally increases the rate of a reaction.
Correct Answer: B — Rate increases
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Q. What is the effect of increasing the distance from the pivot point on the torque produced by a force?
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A.
Torque increases
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B.
Torque decreases
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C.
Torque remains the same
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D.
Torque becomes zero
Solution
Increasing the distance from the pivot point increases the torque produced by the force.
Correct Answer: A — Torque increases
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Q. What is the effect of increasing the pressure on the equilibrium of the reaction: 2N2(g) + 3H2(g) ⇌ 2NH3(g)?
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A.
Shifts to the left
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B.
Shifts to the right
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C.
No effect
-
D.
Increases the rate of reaction
Solution
Increasing the pressure will shift the equilibrium to the right, favoring the formation of NH3, as there are fewer moles of gas on the product side.
Correct Answer: B — Shifts to the right
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Q. What is the effect of increasing the pressure on the rate of a reaction involving gaseous reactants?
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A.
Rate decreases
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B.
Rate increases
-
C.
No effect
-
D.
Depends on the reaction
Solution
Increasing the pressure increases the concentration of gaseous reactants, which generally increases the rate of reaction.
Correct Answer: B — Rate increases
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Q. What is the effect of increasing the temperature on the equilibrium constant of an exothermic reaction?
-
A.
Increases
-
B.
Decreases
-
C.
Remains the same
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D.
Depends on the reaction
Solution
Increasing the temperature of an exothermic reaction decreases the equilibrium constant.
Correct Answer: B — Decreases
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Q. What is the effect of temperature on Raoult's Law?
-
A.
It has no effect.
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B.
It increases vapor pressure.
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C.
It decreases vapor pressure.
-
D.
It only affects the solute.
Solution
Temperature affects the vapor pressure of both the solvent and the solution, generally increasing vapor pressure with temperature.
Correct Answer: B — It increases vapor pressure.
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Q. What is the effect of temperature on the entropy of a substance?
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A.
Entropy decreases with increasing temperature.
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B.
Entropy increases with increasing temperature.
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C.
Entropy remains constant with temperature.
-
D.
Temperature has no effect on entropy.
Solution
As temperature increases, the kinetic energy of particles increases, leading to greater disorder and thus higher entropy.
Correct Answer: B — Entropy increases with increasing temperature.
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Q. What is the effect of temperature on the equilibrium constant for an exothermic reaction?
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A.
Increases with temperature
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B.
Decreases with temperature
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C.
Remains constant
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D.
Depends on the concentration
Solution
For exothermic reactions, increasing the temperature shifts the equilibrium to the left, thus decreasing the equilibrium constant.
Correct Answer: B — Decreases with temperature
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Q. What is the effect of temperature on the equilibrium constant K for an exothermic reaction?
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A.
K increases with temperature
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B.
K decreases with temperature
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C.
K remains constant
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D.
K is independent of temperature
Solution
For an exothermic reaction, increasing the temperature shifts the equilibrium to the left, thus decreasing the value of K.
Correct Answer: B — K decreases with temperature
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Q. What is the effect of temperature on the vapor pressure of a solvent according to Raoult's Law?
-
A.
Vapor pressure decreases with temperature
-
B.
Vapor pressure increases with temperature
-
C.
Vapor pressure remains constant with temperature
-
D.
Vapor pressure is independent of the solvent
Solution
According to Raoult's Law, the vapor pressure of a solvent increases with an increase in temperature.
Correct Answer: B — Vapor pressure increases with temperature
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Q. What is the electron configuration of oxygen (O)?
-
A.
1s2 2s2 2p4
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B.
1s2 2s2 2p6
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C.
1s2 2s1 2p5
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D.
1s2 2s2 2p3
Solution
The electron configuration of oxygen (atomic number 8) is 1s2 2s2 2p4.
Correct Answer: A — 1s2 2s2 2p4
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Q. What is the electron pair geometry of NH3?
-
A.
Tetrahedral
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B.
Trigonal planar
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C.
Octahedral
-
D.
Linear
Solution
NH3 has four electron pairs (three bonding pairs and one lone pair), giving it a tetrahedral electron pair geometry.
Correct Answer: A — Tetrahedral
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Q. What is the electron pair geometry of SF6?
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A.
Tetrahedral
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B.
Trigonal bipyramidal
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C.
Octahedral
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D.
Square planar
Solution
SF6 has six bonding pairs and no lone pairs, resulting in an octahedral electron pair geometry.
Correct Answer: C — Octahedral
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Q. What is the electronic configuration of a chlorine ion (Cl-)?
-
A.
1s2 2s2 2p6 3s2 3p5
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B.
1s2 2s2 2p6
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C.
1s2 2s2 2p6 3s2 3p6
-
D.
1s2 2s2 2p6 3s2 3p4
Solution
Chlorine ion (Cl-) has gained an electron, resulting in the configuration 1s2 2s2 2p6.
Correct Answer: B — 1s2 2s2 2p6
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Q. What is the electronic configuration of a neutral oxygen atom?
-
A.
1s2 2s2 2p4
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B.
1s2 2s2 2p6
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C.
1s2 2s2 2p2
-
D.
1s2 2s2 2p5
Solution
Oxygen has 8 electrons. The electronic configuration is 1s2 2s2 2p4.
Correct Answer: A — 1s2 2s2 2p4
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Q. What is the electronic configuration of a neutral sodium atom?
-
A.
1s2 2s2 2p6 3s1
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B.
1s2 2s2 2p6
-
C.
1s2 2s2 2p5
-
D.
1s2 2s2 2p6 3s2
Solution
Sodium has 11 electrons, and its configuration is 1s2 2s2 2p6 3s1.
Correct Answer: A — 1s2 2s2 2p6 3s1
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Q. What is the electronic configuration of a sodium ion (Na+)?
-
A.
1s2 2s2 2p6
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B.
1s2 2s2 2p6 3s1
-
C.
1s2 2s2 2p5
-
D.
1s2 2s2 2p6 3s2
Solution
Sodium ion (Na+) has lost one electron, resulting in the configuration 1s2 2s2 2p6.
Correct Answer: A — 1s2 2s2 2p6
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Q. What is the electronic configuration of Chlorine?
-
A.
1s2 2s2 2p6 3s2 3p5
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B.
1s2 2s2 2p6 3s2 3p4
-
C.
1s2 2s2 2p6 3s2 3p6
-
D.
1s2 2s2 2p6 3s2 3p3
Solution
Chlorine (Cl) has 17 electrons, so its configuration is 1s2 2s2 2p6 3s2 3p5.
Correct Answer: A — 1s2 2s2 2p6 3s2 3p5
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Q. What is the electronic configuration of Iron?
-
A.
[Ar] 4s2 3d6
-
B.
[Ar] 4s2 3d8
-
C.
[Ar] 4s2 3d5
-
D.
[Ar] 4s2 3d7
Solution
Iron (Fe) has the configuration [Ar] 4s2 3d6.
Correct Answer: A — [Ar] 4s2 3d6
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