Physical Chemistry

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Q. What is the primary reason for the lowering of vapor pressure in a solution?
  • A. Increased temperature
  • B. Decreased surface area
  • C. Presence of solute particles
  • D. Increased molecular weight of solvent
Q. What is the primary reason gases can be compressed much more than liquids or solids?
  • A. High density
  • B. Low density
  • C. Large intermolecular spaces
  • D. Strong intermolecular forces
Q. What is the primary species present in a solution of acetic acid (CH3COOH)?
  • A. CH3COO-
  • B. H+
  • C. CH3COOH
  • D. H2O
Q. What is the primary species present in a solution of sodium acetate (CH3COONa)?
  • A. CH3COO-
  • B. Na+
  • C. H+
  • D. OH-
Q. What is the primary type of bonding in sodium chloride (NaCl)?
  • A. Covalent
  • B. Ionic
  • C. Metallic
  • D. Hydrogen
Q. What is the principal quantum number for an electron in the 5d subshell?
  • A. 3
  • B. 4
  • C. 5
  • D. 6
Q. What is the principal quantum number for an electron in the ground state of a hydrogen atom?
  • A. 0
  • B. 1
  • C. 2
  • D. 3
Q. What is the principal quantum number of the outermost electron in chlorine?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. What is the principal quantum number of the outermost electron in potassium (K)?
  • A. 3
  • B. 4
  • C. 2
  • D. 1
Q. What is the principal quantum number of the valence electrons in chlorine?
  • A. 2
  • B. 3
  • C. 4
  • D. 5
Q. What is the principle behind the law of conservation of mass?
  • A. Mass can be created
  • B. Mass can be destroyed
  • C. Mass is constant in chemical reactions
  • D. Mass is variable in reactions
Q. What is the process called when a solid changes directly into a gas?
  • A. Sublimation
  • B. Evaporation
  • C. Condensation
  • D. Deposition
Q. What is the product formed when Fe2O3 is reduced by carbon monoxide?
  • A. Fe
  • B. CO2
  • C. C
  • D. FeO
Q. What is the rate law expression for a reaction with the rate equation rate = k[A]^2[B]?
  • A. rate = k[A][B]
  • B. rate = k[A]^2
  • C. rate = k[A]^2[B]
  • D. rate = k[B]
Q. What is the reducing agent in the reaction 2MnO4- + 5C2O4^2- + 6H+ → 2Mn^2+ + 10CO2 + 3H2O?
  • A. MnO4-
  • B. C2O4^2-
  • C. H+
  • D. CO2
Q. What is the reducing agent in the reaction Zn + CuSO4 → ZnSO4 + Cu?
  • A. Zn
  • B. Cu
  • C. CuSO4
  • D. ZnSO4
Q. What is the reduction half-reaction for the conversion of MnO4- to Mn2+ in acidic medium?
  • A. MnO4- + 8H+ + 5e- → Mn2+ + 4H2O
  • B. MnO4- + 5e- → Mn2+ + 8H+ + 4H2O
  • C. MnO4- + 4H2O + 5e- → Mn2+ + 8H+
  • D. MnO4- + 5e- + 4H2O → Mn2+ + 8H+
Q. What is the reduction half-reaction for the reaction 2MnO4- + 16H+ + 10e- → 2Mn2+ + 8H2O?
  • A. MnO4- + 8H2O + 10e- → Mn2+ + 16H+
  • B. MnO4- + 10e- + 8H+ → Mn2+ + 4H2O
  • C. MnO4- + 10e- → Mn2+ + 8H2O
  • D. MnO4- + 16H+ → Mn2+ + 10e- + 8H2O
Q. What is the reduction half-reaction for the reaction of copper(II) ions with zinc?
  • A. Cu^2+ + 2e^- → Cu
  • B. Zn → Zn^2+ + 2e^-
  • C. Cu → Cu^2+ + 2e^-
  • D. Zn^2+ + 2e^- → Zn
Q. What is the reduction half-reaction for the reaction of MnO4- in acidic medium?
  • A. MnO4- + 8H+ + 5e- → Mn2+ + 4H2O
  • B. MnO4- + 3e- → MnO2 + 2H2O
  • C. MnO4- + 2e- → MnO2 + 4H+
  • D. MnO4- + 4e- + 8H+ → MnO2 + 4H2O
Q. What is the relationship between enthalpy (H), internal energy (U), and pressure-volume work (PV)?
  • A. H = U + PV
  • B. H = U - PV
  • C. H = U * PV
  • D. H = U / PV
Q. What is the relationship between enthalpy and internal energy?
  • A. H = U + PV
  • B. H = U - PV
  • C. H = U * PV
  • D. H = U / PV
Q. What is the relationship between enthalpy change and internal energy change at constant pressure?
  • A. ΔH = ΔU + PΔV
  • B. ΔH = ΔU - PΔV
  • C. ΔH = ΔU
  • D. ΔH = PΔV
Q. What is the relationship between entropy and spontaneity of a process?
  • A. Higher entropy means the process is non-spontaneous.
  • B. Lower entropy means the process is spontaneous.
  • C. Higher entropy generally indicates a spontaneous process.
  • D. Entropy has no relation to spontaneity.
Q. What is the relationship between entropy and temperature?
  • A. Entropy increases with decreasing temperature
  • B. Entropy decreases with increasing temperature
  • C. Entropy increases with increasing temperature
  • D. Entropy is independent of temperature
Q. What is the relationship between Gibbs Free Energy and spontaneity?
  • A. ΔG < 0 indicates non-spontaneous reactions.
  • B. ΔG = 0 indicates spontaneous reactions.
  • C. ΔG > 0 indicates spontaneous reactions.
  • D. ΔG < 0 indicates spontaneous reactions.
Q. What is the relationship between Gibbs Free Energy and the equilibrium constant (K)?
  • A. ΔG = -RT ln(K)
  • B. ΔG = RT ln(K)
  • C. ΔG = KRT
  • D. ΔG = K - RT
Q. What is the relationship between heat capacity at constant pressure (C_p) and at constant volume (C_v)?
  • A. C_p = C_v
  • B. C_p > C_v
  • C. C_p < C_v
  • D. C_p = 0
Q. What is the relationship between heat capacity at constant pressure (C_p) and heat capacity at constant volume (C_v)?
  • A. C_p = C_v
  • B. C_p > C_v
  • C. C_p < C_v
  • D. C_p = 2C_v
Q. What is the relationship between Ka and Kb for a conjugate acid-base pair?
  • A. Ka + Kb = Kw
  • B. Ka * Kb = Kw
  • C. Ka - Kb = Kw
  • D. Ka / Kb = Kw
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