# Quiz | Chemical Kinetics: Rate Laws

1

What is the rate of the reaction depending of [A] for the reaction 2A + B → C?

$\frac{∆\left[\mathrm{A}\right]}{∆\mathrm{t}}$

2

What is the overall order of a reaction with a rate of reaction = k [A][B]?

0

1

2

3

3

What are the units of k for the rate of reaction = k [A][B] (concentration in mol.L-1) ?

s

mol-2.L2.s

mol-1.L1.s-1

mol-2.L2.s-1

4

What is correct concerning the half-time of a first-order reaction?

t1/2 is independent of the initial concentration of the reactant

t1/2 is proportional to the initial concentration of the reactant

t1/2 is inversely proportional to the initial concentration of the reactant

None of the above

5

What is correct concerning the half-time of a second-order reaction?

t1/2 is independent of the initial concentration of the reactant

t1/2 is proportional to the initial concentration of the reactant

t1/2 is inversely proportional to the initial concentration of the reactant

None of the above

6

What is the relationship between [A] and t for a first-order reaction?

ln[A] = ln[A]0 + kt

$\frac{\left[\mathrm{A}\right]}{{\left[\mathrm{A}\right]}_{0}}$ = e-kt

$\frac{\left[\mathrm{A}\right]}{{\left[\mathrm{A}\right]}_{0}}$ = et

$\frac{1}{\left[\mathrm{A}\right]}$ = $\frac{1}{{\left[\mathrm{A}\right]}_{0}}$ + kt

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