Chemistry - 2013 E.C (2020/2021) Ethiopian University Entrance Exam (EUEE)

A large K_eq value indicates that the reaction reaches equilibrium with very little reactants remaining.

B Small K_eq values indicate the reaction yields very higher amounts of products near equilibrium.

C K_eq will be larger when we have higher amounts of reactants over products.

D Intermediate K_eq value indicates that the reaction does proceed in the forward direction.

A Avogadro's principle.

B Faradays law.

C Le-Chatelier's principle.

D Boyle's law.

A The K_eq expression is the ratio of the concentrations of reactants to the products raised to their coefficients.

B The rate of a reaction is directly proportional to the product of the concentration of reactants raised to the power of their respective coefficients in the balanced equation.

C For a reaction at equilibrium, the reaction quotient, Q is always less than the equilibrium constant, Keq.

D A chemical equilibrium is attained only when the reaction is started with reactants.

A K_p=(P_NO2)/(P_NO)(P_O2)

B K_c=(NO₂)²/(NO)²(O₂₎

C K_p=(P_NO2)²(P_O2)/(P_NO2)

D K_p=(P_NO2)²/(NO)²(O₂)

A 4.6 × 10^-4 mol m^-3

B 1.8 × 10^-3 mol m^-3

C 2.3 × 10^-4 mol m^-3

D 9.1 × 10^-4 mol m^-3

A Copper anode, Zinc cathode, voltmeter , salt bridge

B Zinc cathode, Copper cathode, Zinc anode, Copper cathode

C Copper anode, Zinc anode, CuSO₄(sol), voltmeter

D Zinc anode, Copper cathode, ZnSO₄(sol), salt bridge

A Photosynthesis

B Respiration

C Oxidation

D Fixation

A Animals eat plants and release CO₂ by photosynthesis

B Plants consume atmospheric carbon dioxide during photosynthesis

C Utilization of electrical energy as energy sources

D Natural fires and volcanoes release CO₂ into the air

A in the control of the frequency of television transmissions

B in the construction of transistors and microprocessors

C in coating iron to prevent it from rusting

D in the production of polish body parts cars