Chemistry

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Q. In the complex ion [Fe(CN)6]3-, what is the oxidation state of iron? (2023)
  • A. 0
  • B. +2
  • C. +3
  • D. +4
Q. In the reaction 2Ag+ + Zn → 2Ag + Zn2+, what is the oxidation state of zinc after the reaction?
  • A. 0
  • B. +2
  • C. +1
  • D. -2
Q. In the reaction 2Fe + 3Cl2 → 2FeCl3, which element is oxidized?
  • A. Fe
  • B. Cl2
  • C. FeCl3
  • D. None of the above
Q. In the reaction 2Fe2O3 + 3C → 4Fe + 3CO2, what is being reduced? (2020) 2020
  • A. Fe2O3
  • B. C
  • C. CO2
  • D. Fe
Q. In the reaction 2Mg + O2 → 2MgO, which element is oxidized? (2021)
  • A. Magnesium
  • B. Oxygen
  • C. Both Magnesium and Oxygen
  • D. Neither Magnesium nor Oxygen
Q. In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what happens to the equilibrium when the volume of the container is decreased? (2023)
  • A. Equilibrium shifts to the left
  • B. Equilibrium shifts to the right
  • C. No change in equilibrium
  • D. Equilibrium shifts to the side with more moles
Q. In the reaction 2SO2(g) + O2(g) ⇌ 2SO3(g), what will happen if the volume of the container is increased? (2023)
  • A. Shift to the right
  • B. Shift to the left
  • C. No change
  • D. Increase in temperature
Q. In the reaction 3H2 + N2 → 2NH3, which element is reduced? (2022)
  • A. H2
  • B. N2
  • C. NH3
  • D. None
Q. In the reaction 4Fe + 3O2 → 2Fe2O3, which element is oxidized?
  • A. Fe
  • B. O2
  • C. Fe2O3
  • D. None of the above
Q. In the reaction A(g) + B(g) ⇌ C(g) + D(g), if the temperature is increased, what will be the effect on the equilibrium if the reaction is exothermic? (2020)
  • A. The equilibrium shifts to the left
  • B. The equilibrium shifts to the right
  • C. No effect on the equilibrium
  • D. The reaction rate increases
Q. In the reaction CO(g) + 2H2(g) ⇌ CH3OH(g), what effect does increasing the temperature have if the reaction is exothermic? (2020)
  • A. Shifts equilibrium to the right
  • B. Shifts equilibrium to the left
  • C. No effect on equilibrium
  • D. Increases the rate of reaction
Q. In the reaction N2(g) + 3H2(g) ⇌ 2NH3(g), what happens to the equilibrium position if the pressure is increased? (2023)
  • A. Shifts to the left
  • B. Shifts to the right
  • C. No change
  • D. Depends on temperature
Q. In the reaction Zn + CuSO4 → ZnSO4 + Cu, which species is reduced?
  • A. Zn
  • B. CuSO4
  • C. ZnSO4
  • D. Cu
Q. In the reaction: 2SO2(g) + O2(g) ⇌ 2SO3(g), what effect does increasing the pressure have? (2020)
  • A. Shifts equilibrium to the left
  • B. Shifts equilibrium to the right
  • C. No effect on equilibrium
  • D. Increases the rate of reaction
Q. In the redox reaction 2Ag+ + Cu → 2Ag + Cu2+, which species is oxidized? (2022) 2022
  • A. Ag+
  • B. Cu
  • C. Ag
  • D. Cu2+
Q. In the redox reaction 2Ag+ + Zn → 2Ag + Zn2+, which species is oxidized? (2021)
  • A. Ag+
  • B. Zn
  • C. Ag
  • D. Zn2+
Q. In the redox reaction 2MnO4- + 5C2O4^2- + 16H+ → 2Mn^2+ + 10CO2 + 8H2O, what is the oxidation state of carbon in C2O4^2-?
  • A. +2
  • B. +3
  • C. +4
  • D. +1
Q. In which of the following processes is adsorption utilized? (2023)
  • A. Water purification
  • B. Sublimation
  • C. Distillation
  • D. Filtration
Q. In which state of matter do particles have the highest energy? (2023)
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Bose-Einstein Condensate
Q. In which state of matter do particles have the least amount of energy?
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. Plasma
Q. In which state of matter do particles move freely and are far apart? (2021)
  • A. Solid
  • B. Liquid
  • C. Gas
  • D. None of the above
Q. The Arrhenius equation relates which of the following? (2023)
  • A. Rate constant and temperature
  • B. Concentration and time
  • C. Pressure and volume
  • D. Energy and temperature
Q. The half-life of a first-order reaction is dependent on which of the following? (2020) 2020
  • A. Initial concentration of reactants
  • B. Rate constant
  • C. Temperature
  • D. All of the above
Q. The half-life of a first-order reaction is given by which of the following expressions? (2020)
  • 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) of a first-order reaction? (2020)
  • 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 formula for the half-life (t1/2) of a first-order reaction? (2020)
  • A. t1/2 = 0.693/k
  • B. t1/2 = k/0.693
  • C. t1/2 = 1/k
  • D. t1/2 = k/1
Q. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What is the maximum coverage called? (2021)
  • A. Saturation
  • B. Monolayer
  • C. Multilayer
  • D. Equilibrium
Q. The Langmuir isotherm assumes that adsorption occurs at specific sites on the surface. What does this imply? (2020)
  • A. Adsorption is uniform.
  • B. Adsorption is multilayered.
  • C. Adsorption is monolayered.
  • D. Adsorption is temperature dependent.
Q. The rate constant of a reaction is affected by which of the following? (2023)
  • A. Nature of the reactants
  • B. Temperature
  • C. Catalysts
  • D. All of the above
Q. What does the term 'enthalpy' refer to? (2020)
  • A. Internal energy plus pressure times volume
  • B. Heat content of a system at constant pressure
  • C. Total energy of a system
  • D. Work done by the system
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