Reaction kinetics multiple choice questions

1 of 19

The equation shows the hydrolysis of a bromoalkane.

RBr + OH^- ➔ ROH + Br^-

The rate equation is rate = k[RBr]

RBr is most likely to be

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2 of 19

A reactant Q is converted into two products.

Which of these graphs shows that this reaction is first order with respect to Q?

Four graphs showing concentration of reactant Q versus time, and rate versus concentration of Q to determine first order reaction.

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3 of 19

For a given initial reactant pressure, the half-life for a first order gaseous reaction was found to be 30 minutes.

If the experiment were repeated at half the initial reactant pressure, the half-life would be

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4 of 19

Which statement about the rate determining step of a reaction is correct?

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5 of 19

Nitrogen dioxide reacts with carbon monoxide as in the equation below.

NO₂ + CO ➔ NO + CO₂

The mechanism is:

NO₂ + NO₂ ➔ NO + NO₃ Slow

NO₃ + CO ➔ NO₂ + CO₂ Fast

Which expression is the correct rate equation?

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6 of 19

The equation for the reaction of ICl and H₂ is shown below.

2ICl_(g) + H₂(g) ➔ 2HCl_(g) + I_2(g)

The rate constant k for this reaction is 1.63 × 10^-6 dm³ mol^-1 s^-1.

What is the overall order of the reaction?

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7 of 19

Solutions of two compounds, W and X, react together in the presence of a soluble catalyst, Y, as shown in the equation

2W + X ➔ Z

When the concentrations of W, X and Y are all doubled, the rate of reaction increases by a factor of four.

Which is a possible rate equation for this reaction?

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8 of 19

The rate equation for the hydrogenation of ethene:

C₂H_4(g) + H_2(g) ➔ C₂H_6(g)

is rate = k[C₂H₄][H₂].

At a fixed temperature, the reaction mixture is compressed to triple the original pressure.

What is the factor by which the rate of reaction changes?

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9 of 19

The rate expression for the reaction between X and Y is

rate = k [X]²[Y]

Which statement is correct?

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10 of 19

What are the units of the rate constant for a third order reaction?

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11 of 19

The results of an investigation of the reaction between P and Q are shown in this table.

Table showing initial concentrations of P and Q and initial rate for two experiments investigating the reaction between P and Q.

The rate equation is: rate = k[P][Q]²

What is the initial concentration of Q in experiment 2?

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12 of 19

Iodide ions are oxidised by peroxodisulfate ions in aqueous solution:

2I^- + S₂O₈^2- ➔ I₂ + 2SO₄^2-

This reaction is catalysed by Fe³⁺ ions. This catalysis is effective because

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13 of 19

The reaction below can be catalysed by either Fe²⁺ ions or Fe³⁺ ions.

S₂O₈^2-_(aq) + 2I^-_{(aq) ➔} 2SO₄^2-_(aq) + I_2(aq)

This is because

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14 of 19

Gaseous reactants attach to the catalytic surface by the process of...

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15 of 19

The rate expression for the reaction X_(g) + 2Y_(g) ➔ 3Z_(g) is

rate = k[X]⁰[Y]²

By which factor will the rate of reaction increase when the concentrations of X and Y are both increased by a factor of 3?

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16 of 19

Which is correct about reaction mechanisms?

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17 of 19

The reaction between NO₂ and F₂ gives the following rate data at a certain temperature.

[NO_2_] (mol dm^-3^)	[F_2_] (mol dm^-3^)	Rate (mol dm^-3^ min^-1^)
0.15	0.20	0.10
0.30	0.20	0.40
0.15	0.40	0.20

What is the overall order of reaction ?

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18 of 19

2NO_(g) + O_2(g) ➔ 2NO_2(g)

The rate equation for the reaction above is rate = k[NO]²[O₂]

Which statement is not correct?

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19 of 19

The inorganic anti-cancer drug cis-platin, Pt(NH₃)₂Cl₂, is hydrolysed by water to make it active. The reaction is

Pt(NH₃)₂Cl₂ + H₂O ➔ [Pt(NH₃)₂(H₂O)Cl]⁺ + Cl^-

The hydrolysis is first order overall. The half-life can be found from a graph of the concentration of cis-platin against time.

The half-life of the reaction is...

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Reaction Kinetics

Reaction Kinetics

Reaction Kinetics - exam practice

Reaction Kinetics

Question 1 of 19

Question 2 of 19

Question 3 of 19

Question 4 of 19

Question 5 of 19

Question 6 of 19

Question 7 of 19

Question 8 of 19

Question 9 of 19

Question 10 of 19

Question 11 of 19

Question 12 of 19

Question 13 of 19

Question 14 of 19

Question 15 of 19

Question 16 of 19

Question 17 of 19

Question 18 of 19

Question 19 of 19

Reaction Kinetics - exam practice

Reaction Kinetics

Question 1 of 19

Question 2 of 19

Question 3 of 19

Question 4 of 19

Question 5 of 19

Question 6 of 19

Question 7 of 19

Question 8 of 19

Question 9 of 19

Question 10 of 19

Question 11 of 19

Question 12 of 19

Question 13 of 19

Question 14 of 19

Question 15 of 19

Question 16 of 19

Question 17 of 19

Question 18 of 19

Question 19 of 19