In which of the following reactions decrease or increase in pressure have no effect on the change of direction of the reaction?
Correct answer: A. N2 + O2 ⇋ 2NO
- A. N2 + O2 ⇋ 2NO
- B. N2 + 3H2⇋ 2NH3
- C. PCl5 ⇋ PCl3 + Cl2
- D. 2SO2 + O2⇋ 2SO3
Explanation
Option a is correct. Since the number of moles of reactants = the number of moles of products, so there is no effect of increase or decrease in pressure in the given reversible reaction.
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About Chemical Equilibrium
Reversible reactions reach dynamic equilibrium when forward and reverse rates become equal, and Le Chatelier's principle predicts the effect of changing concentration, pressure or temperature. The chapter also covers solubility product, the common ion effect, buffer action and the conditions used in Haber's process, with equilibrium shifts distinguished from changes in the equilibrium constant.
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