Chemistry

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Q. In which type of solid are the constituent particles held together by covalent bonds? (2022)
  • A. Ionic solids
  • B. Covalent network solids
  • C. Metallic solids
  • D. Molecular solids
Q. In which type of solid are the constituent particles held together by van der Waals forces? (2022)
  • A. Ionic solids
  • B. Covalent solids
  • C. Metallic solids
  • D. Molecular solids
Q. The electrochemical series is a list of elements arranged according to their: (2022)
  • A. Atomic mass
  • B. Electronegativity
  • C. Standard electrode potentials
  • D. Ionization energy
Q. The electrochemical series is a list of: (2023)
  • A. Reactions
  • B. Electrodes arranged by standard electrode potential
  • C. Ionic compounds
  • D. Gases
Q. The entropy of a perfect crystalline substance at absolute zero is given by: (2021)
  • A. 0 J/K
  • B. 1 J/K
  • C. 2 J/K
  • D. Depends on the substance
Q. The equilibrium constant for the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g) is 4. What is the value of Kp? (2023)
  • A. 4
  • B. 16
  • C. 0.25
  • D. 0.0625
Q. The Faraday's first law of electrolysis states that: (2018)
  • A. The mass of substance deposited is directly proportional to the current
  • B. The voltage is directly proportional to the current
  • C. The energy is conserved
  • D. The temperature remains constant
Q. The Freundlich adsorption isotherm is best described by which equation? (2023)
  • A. x/m = kP
  • B. x/m = kP^(1/n)
  • C. P = k(x/m)
  • D. P = k(x/m)^(1/n)
Q. The half-life of a first-order reaction is independent of the initial concentration of the reactant. What is the expression for the half-life? (2022)
  • A. t₁/₂ = 0.693/k
  • B. t₁/₂ = k/0.693
  • C. t₁/₂ = 1/k
  • D. t₁/₂ = k/1
Q. The half-life of a first-order reaction is independent of the initial concentration of the reactant. What is the expression for the half-life (t₁/₂)? (2022)
  • A. t₁/₂ = 0.693/k
  • B. t₁/₂ = k/0.693
  • C. t₁/₂ = 1/k
  • D. t₁/₂ = k/1
Q. The half-life of a first-order reaction is independent of the initial concentration. What is the expression for the half-life?
  • A. t₁/₂ = 0.693/k
  • B. t₁/₂ = k/0.693
  • C. t₁/₂ = 1/k
  • D. t₁/₂ = k/1
Q. The half-life of a first-order reaction is independent of the initial concentration. What is the expression for the half-life (t1/2) of a first-order reaction? (2022)
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/2
Q. The half-life of a first-order reaction is independent of the initial concentration of the reactant. What is the expression for the half-life (t1/2)? (2022)
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/2
Q. The half-life of a first-order reaction is independent of which of the following? (2022)
  • A. Initial concentration
  • B. Rate constant
  • C. Temperature
  • D. All of the above
Q. The half-life of a first-order reaction is independent of which parameter?
  • A. Initial concentration
  • B. Rate constant
  • C. Temperature
  • D. All of the above
Q. The heat capacity at constant volume (Cv) for an ideal gas is related to which of the following? (2023)
  • A. Change in internal energy
  • B. Change in enthalpy
  • C. Change in entropy
  • D. Change in Gibbs free energy
Q. The heat capacity at constant volume (Cv) is defined as: (2022)
  • A. The amount of heat required to raise the temperature of a substance by 1°C at constant pressure.
  • B. The amount of heat required to raise the temperature of a substance by 1°C at constant volume.
  • C. The total heat content of a substance.
  • D. The heat required to change the phase of a substance.
Q. The heat capacity of a substance is defined as: (2023)
  • A. The amount of heat required to raise the temperature of one gram by one degree Celsius.
  • B. The amount of heat required to raise the temperature of one mole by one degree Celsius.
  • C. The total heat content of the substance.
  • D. The heat required to change the state of the substance.
Q. The rate of a reaction is defined as the change in concentration of a reactant or product per unit time. What is the general form of the rate equation? (2023)
  • A. Rate = k[A]^n
  • B. Rate = k[A][B]
  • C. Rate = k[A]^2[B]
  • D. Rate = k[A] + [B]
Q. The rate of a reaction is directly proportional to the concentration of one reactant raised to the power of 2. What is the order of the reaction? (2022)
  • A. Zero order
  • B. First order
  • C. Second order
  • D. Third order
Q. The rate of a reaction is directly proportional to the product of the concentrations of the reactants raised to their respective powers. This statement defines:
  • A. Rate law
  • B. Equilibrium constant
  • C. Reaction quotient
  • D. Catalytic efficiency
Q. The rate of a reaction is directly proportional to the product of the concentrations of the reactants raised to their respective powers. This statement defines which law?
  • A. Law of conservation of mass
  • B. Rate law
  • C. Le Chatelier's principle
  • D. Gibbs free energy
Q. The rate of a reaction is directly proportional to the product of the concentrations of the reactants raised to their respective powers. This statement defines which of the following? (2020)
  • A. Rate law
  • B. Equilibrium constant
  • C. Le Chatelier's principle
  • D. Reaction mechanism
Q. The rate of a reaction is given by the equation rate = k[A]^2[B]. What is the overall order of the reaction? (2020)
  • A. 1
  • B. 2
  • C. 3
  • D. 4
Q. The term 'adsorption' refers to: (2022)
  • A. The process of a substance being taken up by a liquid.
  • B. The accumulation of molecules on a surface.
  • C. The mixing of two liquids.
  • D. The dissolution of a solid in a liquid.
Q. The uncertainty principle is associated with which of the following scientists? (2023)
  • A. Bohr
  • B. Heisenberg
  • C. Schrodinger
  • D. Planck
Q. The unit cell of a diamond structure is best described as which of the following? (2020)
  • A. Simple cubic
  • B. Face-centered cubic
  • C. Body-centered cubic
  • D. Hexagonal
Q. What does the term 'enthalpy' (H) represent? (2019)
  • A. Internal energy plus pressure-volume work
  • B. Total energy of the system
  • C. Heat content at constant pressure
  • D. All of the above
Q. What effect does increasing temperature have on the rate of a chemical reaction? (2023)
  • A. Decreases the rate
  • B. Increases the rate
  • C. No effect
  • D. Depends on the reaction
Q. What happens to the equilibrium constant when a reaction is multiplied by a factor? (2023)
  • A. It remains the same
  • B. It is multiplied by the factor
  • C. It is raised to the power of the factor
  • D. It is divided by the factor
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