Physical Chemistry

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Q. Which of the following pairs of atoms will form a bond with the highest bond order?
  • A. C and O
  • B. N and O
  • C. C and N
  • D. O and O
Q. Which of the following pairs of atoms will form a stable diatomic molecule according to molecular orbital theory?
  • A. N and O
  • B. O and F
  • C. C and N
  • D. B and O
Q. Which of the following pairs of molecules has the same bond order?
  • A. N2 and CO
  • B. O2 and F2
  • C. C2 and B2
  • D. He2 and Ne2
Q. Which of the following processes has a negative ΔG?
  • A. Melting of ice at 0°C.
  • B. Freezing of water at 0°C.
  • C. Dissolving salt in water.
  • D. Sublimation of dry ice.
Q. Which of the following processes has a positive ΔG?
  • A. Combustion of fuels
  • B. Dissolution of salts in water
  • C. Photosynthesis
  • D. Respiration
Q. Which of the following processes is associated with a positive change in entropy?
  • A. Condensation of steam
  • B. Sublimation of dry ice
  • C. Freezing of water
  • D. Compression of gas
Q. Which of the following processes is associated with an increase in entropy?
  • A. Freezing of water
  • B. Condensation of steam
  • C. Sublimation of dry ice
  • D. Melting of ice
Q. Which of the following processes is characterized by constant pressure?
  • A. Isothermal
  • B. Isochoric
  • C. Isobaric
  • D. Adiabatic
Q. Which of the following processes is endothermic and results in an increase in entropy?
  • A. Dissolving salt in water
  • B. Combustion of methane
  • C. Condensation of steam
  • D. Freezing of water
Q. Which of the following processes is endothermic?
  • A. Combustion of fuels
  • B. Dissolving ammonium nitrate in water
  • C. Respiration
  • D. Condensation of steam
Q. Which of the following processes is exothermic?
  • A. Melting of ice
  • B. Dissolving ammonium nitrate in water
  • C. Combustion of methane
  • D. Evaporation of water
Q. Which of the following processes is expected to have the largest increase in entropy?
  • A. Dissolving salt in water
  • B. Melting ice
  • C. Boiling water
  • D. Sublimation of solid iodine
Q. Which of the following processes is expected to have the largest positive change in entropy?
  • A. Dissolving salt in water
  • B. Condensing steam
  • C. Melting ice
  • D. Combining hydrogen and oxygen gases
Q. Which of the following processes is irreversible and leads to an increase in entropy?
  • A. Reversible isothermal expansion
  • B. Free expansion of gas
  • C. Isothermal compression
  • D. Adiabatic expansion
Q. Which of the following processes is isothermal?
  • A. Heating a gas in a closed container
  • B. Compressing a gas without heat exchange
  • C. Allowing a gas to expand slowly while maintaining constant temperature
  • D. Cooling a gas in a closed container
Q. Which of the following processes is spontaneous at constant temperature and pressure?
  • A. Decreasing entropy
  • B. Increasing entropy
  • C. Constant entropy
  • D. None of the above
Q. Which of the following processes results in an increase in entropy?
  • A. Isothermal compression
  • B. Adiabatic expansion
  • C. Isobaric heating
  • D. All of the above
Q. Which of the following properties is characteristic of liquids?
  • A. Definite shape
  • B. Definite volume
  • C. Compressibility
  • D. High viscosity
Q. Which of the following properties is NOT associated with liquids?
  • A. Surface tension
  • B. Viscosity
  • C. Compressibility
  • D. Fluidity
Q. Which of the following properties is NOT typical of liquids?
  • A. High density
  • B. Low compressibility
  • C. Fixed volume
  • D. Fixed shape
Q. Which of the following properties of liquids is affected by temperature?
  • A. Density
  • B. Viscosity
  • C. Surface tension
  • D. All of the above
Q. Which of the following quantum numbers can have a negative value?
  • A. n
  • B. l
  • C. m_l
  • D. m_s
Q. Which of the following quantum numbers can have a value of 0?
  • A. Principal quantum number
  • B. Azimuthal quantum number
  • C. Magnetic quantum number
  • D. Spin quantum number
Q. Which of the following quantum numbers can never be negative?
  • A. n
  • B. l
  • C. m_l
  • D. s
Q. Which of the following quantum numbers cannot be negative?
  • A. Principal quantum number (n)
  • B. Azimuthal quantum number (l)
  • C. Magnetic quantum number (m_l)
  • D. Spin quantum number (m_s)
Q. Which of the following quantum numbers describes the shape of an orbital?
  • A. Principal quantum number
  • B. Azimuthal quantum number
  • C. Magnetic quantum number
  • D. Spin quantum number
Q. Which of the following quantum numbers is associated with the orientation of an orbital?
  • A. n
  • B. l
  • C. m_l
  • D. m_s
Q. Which of the following quantum numbers is not associated with the electron spin?
  • A. n
  • B. l
  • C. m_l
  • D. s
Q. Which of the following quantum numbers is not associated with the electron's energy level?
  • A. n
  • B. l
  • C. m_l
  • D. m_s
Q. Which of the following quantum numbers is not associated with the spin of an electron?
  • A. n
  • B. l
  • C. m_l
  • D. s
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