GATE XL topic:reaction-kinetics PYQs & Answers — Page 2

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topic:reaction-kinetics

Questions 11–14 of 14. Imported answers require independent review unless marked reviewed.

Topic practice 14 questionsPage 2 of 2

The activation energy (

) estimated for a reaction from the Arrhenius equation is 21 kJ mol

. If the frequency factor is assumed to be independent of temperature, then the ratio of the rate constants determined at 298 K and 260 K is ________ (rounded off to two decimal places). (Given: Gas constant, R = 8.315 J K

mol

)

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For the reaction mechanism,

;

. For this step, assume

: rate constant for this step. The rate law is

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The activation energy (Eₐ) values for two reactions carried out at 25 °C differ by 5.0 kJ mol⁻¹. If the pre-exponential factors (A₁ and A₂) for these two reactions are of the same magnitude, the ratio of rate constants (k₁/k₂) is ______ (up to two decimal places). (Given: Gas constant R = 8.314 J K⁻¹ mol⁻¹)

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For a reaction A + B ⟶ products, the following data was obtained.

[A]₀ (M)	[B]₀ (M)	Initial rate
0.1	0.1	r
0.2	0.1	4r
0.1	0.2	2r

A₀ and B₀ are initial concentrations of A and B, respectively. The overall order of the reaction is

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GATE XL topic:reaction-kinetics PYQs

Question 14

Question 6

Question 14

Question 10