Chemical Kinetics Questions

For which of the following, the units of rate constant and rate of the reaction are same -

Using the data given below the order and rate constant for the reaction : CH₃CHO(g) → CH₄(g) + CO(g)

The following data pertain to reaction between A and B : Which of the following conclusions can be drawn from the above data — (a) Rate constant of the reaction 10-4 (b) Rate law of the reaction is k[A][B] (c) Rate of reaction increases four times on

In the reaction : A + 2B + C → D + 2E The rate of reaction remains unchanged if the conc. of B is doubled and that of A and C is kept constant. What is the order with respect to B —

For the reaction NO₂ + CO → CO₂ + NO the experimental rate expression is − dc/dt = k[NO₂]². The number of molecules of CO involved in the slowest step will be —

The rate constant of reaction changes when -

Reaction : 2Br- + H₂O₂ + 2H+ → Br₂ + 2H₂O take place in two steps : (i) (ii) The order of the reaction is —

The rate constant of nᵗʰ order has units -

A reaction A₂ + B₂ → 2AB occurs by the following mechanism - A₂ → A + A ........(slow) A + B₂ → AB + B ......(fast) A + B → AB ........(fast) its order would be -

In acidic medium, the rate of reaction between (BrO₃)- and Br- ion is given by the expression : − it means -

For a reaction 2A + B → C + D, The concentration of B is kept constant but that of A is tripled. The rate of reaction will -

For a hypothetical reaction A + B → products, the rate law is, r = k [B] [A]⁰, the order of reaction is -

When concentration of reactant in reaction A → B is increased by 8 times, the rate increases only 2 times. The order of the reaction would be-

The rate of certain hypothetical reaction A + B + C → products, is given, by The order of reaction is given by -

What is the order of a reaction whose rate law is

For a chemical reaction 2X + Y → Z, the rate of appearance of Z is 0.05 mol L⁻¹ per min. The rate of disappearance of X will be -

For the reaction : N₂ + 3H₂ → 2NH₃. If the rate of disappearance of hydrogen is 1.8 × 10³. What is the rate of formation of ammonia. (mole per litre per sec.)

In the formation of sulphur trioxide by the contact process, 2SO₂ (g) + O₂ (g) ⟶ 2SO₃ (g) The rate of reaction is expressed as − d(O₂)/dt = 2.5 × 10⁻⁴ mol L⁻¹ sec⁻¹ The rate of disappearance of (SO₂) will be -

For a hypothetical reaction A → L, the rate expression is-

For a gaseous reaction, following data is giventhe temperature at which k1 = k2 is

Which curve represents zero order reaction ?

A first order reaction takes 69.3 minute for 50% completion. How much time will be needed for 80% completion -

For a reaction 3A → products, it is found that the rate of reaction doubles, if concentration of A is increased four times, calculate order of reaction

The catalytic activity of the transition metals and their compounds is described to :

For a reaction 2P + Q → S, following data were collected. Calculate the overall order of the reaction.

Which of the following graph is correct for the reaction : A + B → C + D + 100 K cal -

The rate constants of a reaction at 500 K and 600 K are 0.02 s⁻¹ and 0.04 s⁻¹ respectively. The value of activation energy is

A first order reaction has a rate constant 1.15 × 10⁻³ s⁻¹. How long will 5 g of the reactant takes to reduce to 2 g? [log5 = 0.7, log2 = 0.3]

What is the activation energy for a reaction if its rate doubles when the temperature is raised from 20°C to 35°C ? (R = 8.314 J mol–1 K–1)

According to collision theory, conditions for successful reaction are: 1. Sufficient energy 2. Catalyst presence 3. Proper orientation

Given below are two statements: Assertion: Catalyst does not change activation energy Reason: Lower activation energy → faster reaction

Activation energy depends upon:

Which statement is correct about half-life period?

Select the incorrect statement(s):

Given below are two statements: Statement I: Molecularity does not influence rate. Statement II: Rate governed by slowest step.

Collision theory explains rate. Which does NOT influence rate?

The half-life of first order reaction is 25 min. Rate constant is:

The rate of reaction decreases by factor 4 when [B] doubled. Order w.r.t B is:

For reaction 2A → B, correct relation is:

For an endothermic reaction, minimum value of Ea will be;

If the rate constant for first-order reaction is k, time required for 99% completion is;

The rate constant for a first order reaction is 4.606 × 10–3 s–1. Time required to reduce 2.0 g to 0.2 g is:

Consider the first-order decomposition reaction A4(g) → 4A(g). Which statement is correct?

The hydrolysis of methyl formate in acid solution has the rate expression rate = K[HCOOCH3][H+]. The rate law contains [H+] though the balanced equation does not contain H+ because;

The rate constant k1 and k2 for two reactions are given. The temperature at which k1 = k2 is:

What is the effect of raising the temperature on the Maxwell-Boltzmann distribution curve?

Which of the following relation for t1/2 and a is correct for zero order reaction?

The integrated rate equation is given below, kt = log C0 – log Ct / 2.303. The straight line graph is obtained by plotting:

In the Arrhenius equation, the fraction of effective collisions is given by:

A first-order reaction is 25% complete in 30 minutes. What is the half-life of the reaction?