Question

Q. 6. Given the following data for the NH+NO,N2+2H,0 reaction: Trial [NH4+] [NOS] Rate 0.010 M 0.020 M 0.020 M/s 2 0.015 0.020 0.030 3 0.010 0.010 0.005 The rate law for the reaction is: b) rate k[NH NOT d) rate k[NH NO1 a) rate kINH4 TINO21 c) rate kNH4TNO:1 Q. 7. When a catalyst is used in a reaction, a) the forward reaction is increased while the reverse reaction is retarded. b) it does not affect the final amounts of reactants and products. c) the enthalpy change for the reaction becomes more exothermic. d) the activation energy of the reverse reaction is increased. 0. & A reaction has the following stoichiometry: H2 +2 ICI-12+2 HCI Which of the following would be a correct definition of the rate? ?) Rate-HNH)At b)Rate -A[12]/At c) Rate ATICIVAt d)Rate +1[HCIy Q. 9. Which one of the following substances will exhibit dipole-dipole intermolecular forces? a) N2 b) CO2 c) CC4 d) co

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Answer 1

Ans 6

Let NH4+ = A

NO2- = B

Rate law r = - k [A]^m [B]ⁿ

From trial 1 and 2

r1/r2 = [A]1^m [B]1ⁿ / [A]2^m [B]2ⁿ

0.020/0.030 = (0.010/0.015)^m

0.666 = 0.666^m

m = 1

From trial 1 and 3

r1/r3 =  [A]1^m [B]1ⁿ /  [A]3^m [B]3ⁿ

0.020/0.005 = (0.020/0.010)ⁿ

4 = 2ⁿ

n = 2

Rate law

r = - k [A] [B]²

r = - k [NH4+] [NO2-]²

Option B is the correct answer