Physical Chemistry

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Q. In which phase of matter do particles have the least kinetic energy?
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. In which phase of matter do particles have the most kinetic energy?
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. In which scenario does the ideal gas law (PV=nRT) fail to accurately predict gas behavior?
  • A. High temperature and low pressure
  • B. Low temperature and high pressure
  • C. Moderate temperature and pressure
  • D. All scenarios
Q. In which state of matter do particles have the least kinetic energy?
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. In which type of bond does electron sharing occur?
  • A. Ionic
  • B. Covalent
  • C. Metallic
  • D. Hydrogen
Q. In which type of bond is the electron density concentrated above and below the bond axis?
  • A. Sigma bond
  • B. Pi bond
  • C. Ionic bond
  • D. Covalent bond
Q. In which type of bond is the electron density concentrated between the nuclei of the bonded atoms?
  • A. Ionic bond
  • B. Covalent bond
  • C. Metallic bond
  • D. Hydrogen bond
Q. In which type of hybridization does an atom use one s and three p orbitals?
  • A. sp
  • B. sp2
  • C. sp3
  • D. sp3d
Q. In which type of reaction is the bond dissociation energy most relevant?
  • A. Endothermic reaction
  • B. Exothermic reaction
  • C. Catalytic reaction
  • D. Equilibrium reaction
Q. What does a positive cell potential indicate?
  • A. Spontaneous reaction
  • B. Non-spontaneous reaction
  • C. Equilibrium
  • D. No reaction
Q. What does Hess's law state about enthalpy changes?
  • A. Enthalpy changes are independent of the path taken.
  • B. Enthalpy changes depend on the temperature.
  • C. Enthalpy changes are always positive.
  • D. Enthalpy changes can be calculated using average bond energies.
Q. What does the Arrhenius equation describe?
  • A. The relationship between temperature and reaction rate
  • B. The relationship between pressure and volume
  • C. The relationship between concentration and solubility
  • D. The relationship between energy and wavelength
Q. What does the term 'activation energy' refer to?
  • A. The energy required to start a reaction.
  • B. The energy released during a reaction.
  • C. The energy of the products.
  • D. The energy of the reactants.
Q. What does the term 'electrolyte' refer to?
  • A. A non-conductive solution
  • B. A conductive solution
  • C. A solid conductor
  • D. A gas
Q. What does the term 'enthalpy of formation' refer to?
  • A. Energy required to break bonds
  • B. Energy change when one mole of a compound is formed from its elements
  • C. Energy released during combustion
  • D. Energy change during a phase transition
Q. What does the term 'enthalpy' represent?
  • A. Internal energy plus pressure times volume
  • B. Total energy of a system
  • C. Heat content at constant pressure
  • D. All of the above
Q. What does the term 'overpotential' refer to in electrochemistry?
  • A. The potential difference required to drive a reaction
  • B. The maximum potential of a cell
  • C. The potential at which equilibrium is reached
  • D. The energy lost as heat
Q. What does the term 'overpotential' refer to?
  • A. The potential difference needed to drive a reaction
  • B. The maximum voltage of a cell
  • C. The energy lost as heat
  • D. The efficiency of a battery
Q. What does the term 'partial pressure' refer to in a gas mixture?
  • A. The pressure exerted by a single gas in a mixture
  • B. The total pressure of the gas mixture
  • C. The pressure of the gas at absolute zero
  • D. The pressure of the gas when it is liquefied
Q. What effect does adding an inert gas at constant volume have on the equilibrium of a reaction?
  • A. Shifts to the right
  • B. Shifts to the left
  • C. No effect
  • D. Increases the rate of reaction
Q. What effect does decreasing the temperature have on an endothermic reaction at equilibrium?
  • A. Shifts to the right
  • B. Shifts to the left
  • C. No effect
  • D. Increases the reaction rate
Q. What effect does increasing the temperature have on the rate of a chemical reaction?
  • A. Decreases the rate
  • B. Increases the rate
  • C. No effect on the rate
  • D. Depends on the reaction
Q. What happens to the density of a gas if its temperature is increased at constant pressure?
  • A. Density increases
  • B. Density decreases
  • C. Density remains the same
  • D. Density fluctuates
Q. What happens to the equilibrium of the reaction 2NO2(g) ⇌ N2O4(g) when the temperature is decreased?
  • A. Shift to the left
  • B. Shift to the right
  • C. No change
  • D. Increase the rate of reaction
Q. What happens to the equilibrium position of a reaction when the concentration of a reactant is increased?
  • A. The equilibrium shifts to the right
  • B. The equilibrium shifts to the left
  • C. The equilibrium remains unchanged
  • D. The reaction stops
Q. What happens to the equilibrium position of a reaction when the temperature is increased for an endothermic reaction?
  • A. Shifts to the left
  • B. Shifts to the right
  • C. No change
  • D. Depends on pressure
Q. What happens to the equilibrium position when the concentration of a reactant is increased?
  • A. The equilibrium shifts to the right
  • B. The equilibrium shifts to the left
  • C. No change occurs
  • D. The reaction stops
Q. What happens to the equilibrium position when the concentration of a reactant is increased in a reversible reaction?
  • A. The equilibrium shifts to the right
  • B. The equilibrium shifts to the left
  • C. The equilibrium remains unchanged
  • D. The reaction stops
Q. What happens to the equilibrium position when the concentration of a reactant is increased in a system at equilibrium?
  • A. The equilibrium shifts to the right
  • B. The equilibrium shifts to the left
  • C. No change occurs
  • D. The reaction rate increases
Q. What happens to the position of equilibrium when the concentration of a reactant is increased?
  • A. The equilibrium shifts to the right
  • B. The equilibrium shifts to the left
  • C. No change occurs
  • D. The reaction stops
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