Question

55. Which one of the following is not a valid expression for the rate of the reaction below? Page 11 4NH ( + 7026 4NO. + 6H.00 A) - ALO 7 Δι B) | AINO.1 4 ΔΙ C) I ALHO 6 Δι D). 1 4 ΔΙΝΗ] At E) All of the above are valid expressions for the rate of reaction. 56. In which of the following aqueous solutions would you expect AgBr to have the least molar solubility? AgBroAg + Bry A) 0.0200 M AgF B) 0.040 M AgNO3 C) 0.030 M NaBr D) 0,010 M LIBE E) AgBr will have the same solubility in all solutions. 57. In a redox reaction at standard conditions, the values for E (of the cell) and AG® must be for the cell to be spontaneous? A) E' is positive and AG® is positive B) Eis positive and AG" is negative C) E is negative and AG® is positive D) E' is negative and AG is negative 58. In which of the following reactions would increasing pressure at constant temperature NOT change the concentrations of reactants and products, based on Le Chatelier's principle? A) N (8) + 3H, B) N0. (8) ON (9) + 20, (8) D) 2N (9) + () E) N. (8) + 0,(9) 2NH, () 2NO, (8) 2N0 (8) 2NO 2NO(g)

Answer 1

55. 니NH +70 NN +640 rate =-1 d [creactant] C at Id [punduct dt (c-oefficient) rate 고 d [NH₃ dt d[0] at Id [NO, at 극 1. d Ho] 1) dt

Answer: E) All of the above 56. + Ag Br - Ag Ag + Bu Ber un solubility of Ag Bor depends on the extend of dissociation of Ag Br, which will decrease of there is abuady the presence of Agt or the solutions due to common in effect. Also mer more the com. of Agt or Bor us the solution, less is the solubility in such solution. Answer: B) 0.040 M AgNO₃ This is because it produres 0.04M of Ag which is higher compared to othas.

57. For a spontaneous reaction, AGLO & A E O This is because, loG=-nF E celu see that both have opposite and we signs. Answer: B) E is the and DG is ove 58 When there is an increase un pressure, the equilibrium will shift towards the side of the reaction with fewer no. of moles of gas : Thus for equilibrium to not shift we need to have equal no. of moles in

both sudes of the reaction. And reaction from the givers Only such options is : N₂ + 2 = 2 No Answer: E