29. For the reaction, N(g)+0(g) 2NO(g) K, is 0.01 at 2000 C. After this sy equil
ID: 637249 • Letter: 2
Question
29. For the reaction, N(g)+0(g) 2NO(g) K, is 0.01 at 2000 C. After this sy equilibrium, 0.015 moles of N2 are added. How does the addition of N2 affect the concentrations of both O2 and NO once equilibrium is established again? stem has established (A) The concentration of O2 decreases and the (B) The concentration of O: increases and the (C) The concentration of O, does not change and the concentration of NO increases. concentration of NO decreases. concentration of NO increases. The concentration of O, decreases and the concentration of NO does not change. (D)
Explanation / Answer
According to Le-Chatelier's principle if any disturbance is caused to a system in equilibrium , the system will rearrange itself so as to attain the equilibrium again.
If concentration is increased then the equilibrium shifts from the higher concentration region to lower concentration side.
If the temperature is increased the equilibrium shifts to the side of endothermic reaction and if decreased towards the exothermic side.
If pressure is increased the equilibrium shifts to lower number of moles region anf if decreased towards higher number of moles region.
29.) Here the equilibrium shifts from reactant side to product side ie, towards forward reaction. The option A is the answer. More of O2 will be consumed and NO will be formed.
30.) If we decrease the volume the pressure will increase (Boyle's law), the number of moles on reactant side is more than that of products and so the shift will be towards forward reaction. So SO3 concentration will increase if we decrease the volume. So option D is the answer. All the others favours reverse reaction.
31.) According to Lowry-Bronsted theory the one that donate proton (H) is the acid and the anion/neutral species generated is the conjugate base. The one that accepts proton is the base and the cation/neutral species generated is the conjugate acid.
Here the bases are F- and Cl-. Thus option B i sthe answer.
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