KCET 2024 | Chemical Kinetics Question 2 | Chemistry

For the reaction, $\mathrm{PCl}_5 \longrightarrow \mathrm{PCl}_3+\mathrm{Cl}_2$, rate and rate constant are $1.02 \times 10^{-4} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$ and $3.4 \times 10^{-5} \mathrm{~s}^{-1}$ respectively at a given instant. The molar concentration of $\mathrm{PCl}_5$ at that instant is

$8.0 \mathrm{~mol} \mathrm{~L}^{-1}$

$3.0 \mathrm{~mol} \mathrm{~L}^{-1}$

$0.2 \mathrm{~mol} \mathrm{~L}^{-1}$

$2.0 \mathrm{~mol} \mathrm{~L}^{-1}$

KCET 2024

MCQ (Single Correct Answer)

-0

Which one of the following does not represent Arrhenius equation?

$\log k=\log A-\frac{E_a}{2.303 R T}$

$k=A e^{\frac{-E_a}{R T}}$

$\ln k=-\frac{E_a}{R T}+\ln A$

$k=A e^{\frac{E_a}{R T}}$

KCET 2023

MCQ (Single Correct Answer)

-0

In which one of the following reactions, rate constant has the unit $$\mathrm{mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$$ ?

Acid catalysed hydrolysis of $$\mathrm{CH}_3 \mathrm{COOCH}_3$$

$$\mathrm{CHCl}_3+\mathrm{Cl}_2 \longrightarrow \mathrm{CCl}_4+\mathrm{HCl}$$

$$2 \mathrm{NO}(g)+\mathrm{O}_2(g) \longrightarrow 2 \mathrm{NO}_2(g)$$

Decomposition of HI on the surface of gold

KCET 2023

MCQ (Single Correct Answer)

-0

For a reaction, the value of rate constant at $$300 \mathrm{~K}$$ is $$6.0 \times 10^5 \mathrm{~s}^{-1}$$. The value of Arrhenius factor $$A$$ at infinitely high temperature is

$$6 \times 10^5 \times e^{-E_a / 300 R}$$

$$e^{-E_a / 300 R}$$

$$\frac{6 \times 10^{-5}}{300}$$

$$6 \times 10^5$$

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