Chemical Kineti...

Direction (Q. Nos. 1-12) This section contains 12 multiple choice questions. Each question has four choices (a), (b), (c) and (cl), out of which ONLY ONE is correct.

Q.

The rate of a reaction doubles when its temperature changes from 300 K to 310 K. Activation energy of such a reaction will be (Given, R = 8.314 J K^-1 mol^-1, log2 = 0.3010).

In the following reaction

N₂O  N₂+O

k = (5.0 x 10¹¹ L mol^-1 s^-1) e ^-29000R/T, E_a (energy o f activation) is 

Rate of a reaction can be expressed by Arrhenius equation as k = Ae^-EalRT. In this equation, E_a represents.

In the upper atmosphere, form ation of H₂O₂ takes place as

H₂O+O → 2OH → H₂0₂

ΔH⁰ = 72.0 Kj mol^-1 ; E_a = 77.0 kJ mol^-1

E_a for the bim olecular recombination of two OH radicals to form H₂O and O is

How much rate is affected in the presence of catalyst at 300 K?

For a reaction,

A → Product

t₅₀  = 100 min at temprature T₁

and t₅₀ = 80 min at temprature T₂

Thus, 

Rate constant (k) of a reaction has least value at

Two reactions with different activation energies have the same rate at room temperature. Which statement correctly describes the rates of these two reactions at the same higher temperature?

The activation energy of the reaction at a given temperature is found to (2.303 RT) J mol^-1. The ratio of rate constant to the Arrhenius factor is

From the given figure, select the correct statement about activation energy.

Activation energy of

The rate of a chemical reaction doubles for every 10°C rise of temperature. If the tem perature is raised by 50°C, the rate of the reaction increases by about

[AIEEE 2011]

A reactant A forms two products B and C as given

A  B, Activation energy E_a1

A  C, Activation energy E_a2

if E_a2 = 2E_a1, then k₁ and K₂ are related as 

[AIEEE 2011]

Direction (Q. No. 13) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d), out of which one is correct.

  Rate constant {k) of a reaction is given by

Match the given property in Column I with its related value in Column II and select answer from codes given: