Physical Chemistry

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Q. What is the effect of a catalyst on the equilibrium position of a reversible reaction?
  • A. Shifts the equilibrium to the right
  • B. Shifts the equilibrium to the left
  • C. No effect on equilibrium position
  • D. Increases the equilibrium constant
Q. What is the effect of a non-volatile solute on the boiling point of a solvent?
  • A. It decreases the boiling point
  • B. It increases the boiling point
  • C. It has no effect
  • D. It changes the boiling point unpredictably
Q. What is the effect of adding a catalyst to a chemical equilibrium?
  • A. Increases the yield of products
  • B. Increases the rate of reaction
  • C. Shifts the equilibrium position
  • D. Has no effect on the equilibrium
Q. What is the effect of adding a catalyst to a system at equilibrium?
  • A. Increases the rate of the forward reaction only
  • B. Increases the rate of the reverse reaction only
  • C. Increases the rate of both forward and reverse reactions
  • D. Shifts the equilibrium position
Q. What is the effect of adding a common ion to a saturated solution?
  • A. Increases solubility
  • B. Decreases solubility
  • C. No effect on solubility
  • D. Changes the pH
Q. What is the effect of adding a non-volatile solute to a solvent on the vapor pressure of the solvent?
  • A. It increases the vapor pressure.
  • B. It decreases the vapor pressure.
  • C. It has no effect on the vapor pressure.
  • D. It doubles the vapor pressure.
Q. What is the effect of adding a solute to a solvent on the boiling point of the solution?
  • A. Boiling point decreases
  • B. Boiling point remains the same
  • C. Boiling point increases
  • D. Boiling point becomes unpredictable
Q. What is the effect of adding a strong acid to a buffer solution?
  • A. pH increases
  • B. pH decreases significantly
  • C. pH remains relatively constant
  • D. pH becomes neutral
Q. What is the effect of adding a strong base to a buffer solution?
  • A. pH decreases
  • B. pH increases
  • C. pH remains constant
  • D. Buffer capacity increases
Q. What is the effect of adding an inert gas at constant volume on the equilibrium of a reaction?
  • A. Shifts the equilibrium to the right
  • B. Shifts the equilibrium to the left
  • C. No effect on the equilibrium position
  • D. Increases the equilibrium constant
Q. What is the effect of adding an inert gas at constant volume on the equilibrium of the reaction A(g) ⇌ B(g)?
  • A. Shifts to the right
  • B. Shifts to the left
  • C. No effect
  • D. Increases the rate of reaction
Q. What is the effect of adding an inert gas at constant volume on the equilibrium position?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase the rate of reaction
Q. What is the effect of dilution on the pH of a strong acid solution?
  • A. pH increases
  • B. pH decreases
  • C. pH remains constant
  • D. pH becomes neutral
Q. What is the effect of dilution on the pH of a strong acid?
  • A. pH increases
  • B. pH decreases
  • C. pH remains constant
  • D. pH becomes neutral
Q. What is the effect of dilution on the pH of a weak acid solution?
  • A. pH decreases
  • B. pH increases
  • C. pH remains constant
  • D. pH becomes neutral
Q. What is the effect of increasing electronegativity difference on bond character?
  • A. Increases covalent character
  • B. Decreases ionic character
  • C. Increases ionic character
  • D. No effect
Q. What is the effect of increasing pressure on the boiling point of a liquid?
  • A. Boiling point decreases
  • B. Boiling point increases
  • C. No effect
  • D. Boiling point becomes constant
Q. What is the effect of increasing temperature on a reaction with a negative ΔH and positive ΔS?
  • A. It makes ΔG more negative.
  • B. It makes ΔG less negative.
  • C. It has no effect on ΔG.
  • D. It makes ΔG positive.
Q. What is the effect of increasing temperature on a reaction with ΔH > 0 and ΔS < 0?
  • A. Increases spontaneity
  • B. Decreases spontaneity
  • C. No effect on spontaneity
  • D. Makes it spontaneous at high temperatures
Q. What is the effect of increasing temperature on an exothermic reaction at equilibrium?
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase the rate of reaction
Q. What is the effect of increasing temperature on physisorption?
  • A. Increases adsorption
  • B. Decreases adsorption
  • C. No effect
  • D. Depends on the adsorbate
Q. What is the effect of increasing temperature on the cell potential according to the Nernst equation?
  • A. Increases cell potential
  • B. Decreases cell potential
  • C. No effect
  • D. Depends on the reaction
Q. What is the effect of increasing temperature on the cell potential?
  • A. Increases
  • B. Decreases
  • C. Remains constant
  • D. Depends on the reaction
Q. What is the effect of increasing temperature on the density of liquids?
  • A. Density increases
  • B. Density decreases
  • C. Density remains constant
  • D. Density fluctuates randomly
Q. What is the effect of increasing temperature on the entropy of a substance?
  • A. Entropy decreases
  • B. Entropy increases
  • C. Entropy remains constant
  • D. Entropy becomes zero
Q. What is the effect of increasing temperature on the entropy of a system?
  • A. Increases entropy
  • B. Decreases entropy
  • C. No effect
  • D. Depends on the system
Q. What is the effect of increasing temperature on the equilibrium constant Kc for an endothermic reaction?
  • A. Kc increases
  • B. Kc decreases
  • C. Kc remains constant
  • D. Kc becomes zero
Q. What is the effect of increasing temperature on the equilibrium constant of an exothermic reaction?
  • A. Increases
  • B. Decreases
  • C. Remains the same
  • D. Becomes zero
Q. What is the effect of increasing temperature on the equilibrium constant of an endothermic reaction?
  • A. Increases
  • B. Decreases
  • C. No effect
  • D. Depends on the reaction
Q. What is the effect of increasing temperature on the kinetic energy of gas molecules?
  • A. Increases kinetic energy
  • B. Decreases kinetic energy
  • C. No effect
  • D. Depends on the gas
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