MHT CET 2021 22th September Evening Shift | Chemical Kinetics Question 52 | Chemistry

Which of the following statements is NOT true for a reaction having rate law $$\mathrm{r}=\mathrm{k}\left[\mathrm{H}_2\right]\left[\mathrm{I}_2\right]$$ ?

The reaction is first order in $$\mathrm{H}_2$$

Overall order of reaction is 1

The reaction is first order in $$\mathrm{I}_2$$

Overall order of reaction is 2

MHT CET 2021 22th September Evening Shift

MCQ (Single Correct Answer)

-0

For the reaction $$\mathrm{N}_{2(\mathrm{~g})}+3 \mathrm{H}_{2(\mathrm{~g})} \rightarrow 2 \mathrm{NH}_{3(\mathrm{~g})}$$, what is the relation between $$\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}$$ and $$\frac{\mathrm{d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}$$ ?

$$3 \frac{\mathrm{d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}$$

$$\frac{\mathrm{d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=3 \frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}$$

$$3 \frac{\mathrm{d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=2 \frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}$$

$$\frac{\mathrm{d}\left[\mathrm{H}_2\right]}{\mathrm{dt}}=\frac{\mathrm{d}\left[\mathrm{N}_2\right]}{\mathrm{dt}}$$

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

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For a reaction $$\mathrm{A} \rightarrow$$ product, rate constant is $$2 \times 10^{-2} \mathrm{~s}^{-1}$$. The initial concentration of $$\mathrm{A}$$ is 1.0 mol dm$${ }^{-3}$$. What is the value of $$\log \frac{1}{[\mathrm{~A}]_{\mathrm{t}}}$$ after 100 seconds?

$$0.430 \mathrm{~mol} \mathrm{~dm}^{-3}$$

$$0.135 \mathrm{~mol} \mathrm{~dm}^{-3}$$

$$0.270 \mathrm{~mol} \mathrm{~dm}^{-3}$$

$$0.868 \mathrm{~mol} \mathrm{~dm}^{-3}$$

MHT CET 2021 22th September Morning Shift

MCQ (Single Correct Answer)

-0

Identify order of reaction if it's rate constant is x sec$$^{-1}$$.

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