Which plot of $\ln \mathrm{k}$ vs $\frac{1}{\mathrm{~T}}$ is consistent with Arrhenius equation?
- A
- B
- ✓
- D
Answer: C.
View full solution →Question types
3. Chemical kinetics question types
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Sample Questions
3. Chemical kinetics questions
One sample from each question group in this chapter. Select any group above to see the full set with answer keys.
Activation energy of any chemical reaction can be calculated if one knows the value of
- Aprobability of collision
- Borientation of reactant molecules during collision
- ✓rate constant at two different temperatures
- Drate constant at standard temperature
Answer: C.
View full solution →The rate of a reaction quadruples when temperature changes from $27^{\circ} \mathrm{C}$ to $57^{\circ} \mathrm{C}$. Calculate the energy of activation.
Given $\mathrm{R}=8.314 \mathrm{~J} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}, \log 4=0.6021$
- A$380.4 \mathrm{~kJ} / \mathrm{mol}$
- B$3.80 \mathrm{~kJ} / \mathrm{mol}$
- C$3804 \mathrm{~kJ} / \mathrm{mol}$
- ✓$38.04 \mathrm{~kJ} / \mathrm{mol}$
Answer: D.
View full solution →For a certain reaction, the rate $=k[A]^2[B]$, when the initial concentration of $A$ is tripled keeping concentration of $B$ constant, the initial rate would
- AIncrease by a factor of three
- BDecrease by a factor of nine
- CIncrease by a factor of six
- ✓Increase by a factor of nine
Answer: D.
View full solution →The given graph is a representation of kinetics of a reaction.
$[Image]$
The $y$ and $x$ axes for zero and first order reactions, respectively are
- Azero order $(y=$ concentration and $x=$ time), first order $(y=$ rate constant and $x=$ concentration)
- ✓zero order ( $y=$ rate and $x=$ concentration), first order $\left(y=t_{1 / 2}\right.$ and $x=$ concenration)
- Czero order ( $y=$ rate and $x=$ concentration), first order $\left(y=\right.$ rate and $\left.x= t _{1,2}\right)$
- Dzero order ( $y=$ concentration and $x=$ time), first order $\left(y=t_{1 / 2}\right.$ and $x=$ concentration)
Answer: B.
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