Chemical Kinetics PYQs - Last 10 Years

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Practice 31 AP EAPCET Chemistry questions from Chemical Kinetics. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.

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Last 10 Years Chemical Kinetics Questions

Showing 31 of 31 filtered questions.

1Chemical Kinetics

For a reaction, the graph of $\ln k$ (on $y$-axis) and $\frac{1}{T}$ (on $x$-axis) is a straight line with a slope $-2 \times 10^4 \mathrm{~K}$. The activation energy of the reaction (in $\mathrm{kJ} \mathrm{mol}^{-1}$ ) is ( $R=8.3 \mathrm...

2Chemical Kinetics

$R \longrightarrow P$ is a first order reaction. The concentration of $R$ changed from 0.04 to $0.03 \mathrm{molL}^{-1}$ in 40 min . What is the average velocity of the reaction in $\mathrm{mol} \mathrm{L}^{-1} \mathrm{~s}^{-1}$ ?

3Chemical Kinetics

The following graph is obtained for a first order reaction $(A \rightarrow P)$. The activation energy ( $E_a$ in $\left.\mathrm{kJ} \mathrm{mol}^{-1}\right)$ and heat of reaction $\left(|\Delta H|\right.$ in $\left.\mathrm{kJ} \mathrm{mol}^...

4Chemical Kinetics

For a first order reaction, the ratio between the time taken to complete $\frac{3}{4}$ th of the reaction and time taken to complete half of the reaction is

5Chemical Kinetics

$A \rightarrow B$ is a first order reaction. The concentration of $A$ is decreased from $x \mathrm{~mol} \mathrm{~L}^{-1}$ to $y \mathrm{~mol} \mathrm{~L}^{-1}$ in 100 min . What is the average velocity of the reaction in $\mathrm{mol} \mat...

6Chemical Kinetics

The following equation is obtained for a first order reaction at 300 K
\(\log _{10} \frac{k}{A}=0.00174\)
What is the activation energy (in $\mathrm{J} \mathrm{mol}^{-1}$ ) of the reaction?
$$ \left(R=8314 \mathrm{~J} \mathrm{~mol}^{-1} \...

7Chemical Kinetics

At $T(\mathrm{~K})$ the following equation is obtained for a first order reaction $\log \frac{k}{A}=-\frac{x}{T}$. The activation energy for this reaction is equal to ( $R=$ gas constant)

8Chemical Kinetics

In a first order reaction, the concentration of the reactant is reduced to $1 / 8$ of the initial concentration in 75 minutes. The $t_{1 / 2}$ of the reaction (in minutes) is $(\log 2=0.30, \log 3=0.47, \log 4=0.60)$

9Chemical Kinetics

Activation energy for the hydrolysis of sucrose by acid is $X \mathrm{~kJ} \mathrm{~mol}^{-1}$ whereas activation energy for the hydrolysis of sucrose by sucrase is $Y \mathrm{~kJ} \mathrm{~mol}^{-1} . X$ and $Y$ respectively are

10Chemical Kinetics

Consider the reaction given below
\(A+2 B \longrightarrow 3 C+2 D\)
If rate of disappearance of $B$ is $x \times 10^{-2} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$, the ratio of rate of reaction and rate of appearance of $C$ is

11Chemical Kinetics

$A \rightarrow$ products, is a first order reaction. The following data is obtained for this reaction at $T(\mathrm{~K})$. The value of $x: y$ is
$$ \begin{array}{cc} \hline \text { Rate }\left(\mathrm{molL}^{-1} \mathrm{~min}^{-1}\right) &...

12Chemical Kinetics

$A \rightarrow P$ is a first order reaction. The following graph is obtained for this reaction. $(X$-axis $=$ time: $Y$-axis $=$ conc. of $A$ ) The instantaneous rate of the reaction at point $C$ is

13Chemical Kinetics

Isomerisation of gaseous cyclobutene to butadiene is first order reaction. At $T(\mathrm{~K})$. The rate constant of reaction is $33 \times 10^{-4} \mathrm{~s}^{-1}$. What is the time required (in min ) to complete $90 \%$ of this reaction ...

14Chemical Kinetics

The rate constant of a first order reaction was doubled when the temperature was increased from 300 to 310 K . What is its approximate activation energy (in $\mathrm{kJ} \mathrm{mol}^{-1}$ )? ( $R=8.3 \mathrm{Jmol}^{-1} \mathrm{~K}^{-1}: \l...

15Chemical Kinetics

The rate constant of a first order reaction is $3.46 \times 10^{-2} \mathrm{~s}^{-1}$ at 298 K . What is the rate constant of the reaction at 350 K if its activation energy is $50.1 \mathrm{~kJ} \mathrm{~mol}^{-1}$, $\left(R=8.314 \mathrm{J...

16Chemical Kinetics

$A \rightarrow P$ is a zero order reaction. At 298 K the rate constant of the reaction is $1 \times 10^{-3} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$. Initial concentration of ' $A$ ' is $0.1 \mathrm{~mol} \mathrm{~L}^{-1}$. What is ...

17Chemical Kinetics

For a first order reaction the concentration of reactant was reduced from $0.03 \mathrm{molL}^{-1}$ to $0.02 \mathrm{molL}^{-1}$ in 25 min . What is its rate (in $\mathrm{molL}^{-1} \mathrm{~s}^{-1}$ )?

18Chemical Kinetics

At 298 K the value of $-\frac{\Delta\left[\mathrm{Br}^{-}\right]}{\Delta t}$ for the reaction,
$5 \mathrm{Br}^{-}(a q)+\mathrm{BrO}_3^{-}(a q)+6 \mathrm{H}^{+}(a q) \longrightarrow 3 \mathrm{Br}_2(a q)+3 \mathrm{H}_2 \mathrm{O}(l)$ is $X$ ...

19Chemical Kinetics

Identify the autocatalytic reaction from the following

20Chemical Kinetics

The first order reaction, $A(g) \rightarrow B(g)+2 C(g)$ occurs at $25^{\circ} \mathrm{C}$. After 24 minutes the ratio of the concentration of products to the concentration of the reactant is $1: 3$ What is the half life is of the reaction ...

21Chemical Kinetics

At 298 K , for a first order resction $(A \rightarrow P)$ the following graph is obtained. The rate constant ( in s ${ }^{-1}$ ) and initial concentration ( in mol $\mathrm{L}^{-1}$ ) of ' $A$ ' are respectively $(Y$-axis $=\ln (a-x): X$-ax...

22Chemical Kinetics

For the reaction $A+B \rightarrow C$, the following data were obtained
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23Chemical Kinetics

The rate constant, $k$ of a zero order reaction $2 \mathrm{NH}_3(g) \xrightarrow[1130 \mathrm{~K}]{\mathrm{Pt}} \mathrm{N}_2(g)+3 \mathrm{H}_2(g)$ is $y \times 10^{-4} \mathrm{molL}^{-1} \mathrm{~s}^{-1}$. The rate of formation of hydrogen ...

24Chemical Kinetics

The rate constant of a reaction at 500 K and 700 K are \(0.02 \mathrm{~s}^{-1}\) and \(0.2 \mathrm{~s}^{-1}\) respectively. The activation energy of the reaction (in \(\left.\mathrm{kJ} \mathrm{mol}^{-1}\right)\) is $$\left(R=8.3 \mathrm{JK...

25Chemical Kinetics

. The rate constant for a zero order reaction \(A \longrightarrow\) products is \(0.0030 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~S}^{-1}\). How long it will take for the initial concentration of \(A\) to fall from 0.10 M to 0.075 M ?

26Chemical Kinetics

The time required for completion of \(93.75 \%\) of a first order reaction is \(x\) minutes. The half-life of it (in minutes) is

27Chemical Kinetics

For zero order reaction, a plot of \(t_{1 / 2}\) versus
\([A]_0\) will be

28Chemical Kinetics

Which statement among the following is incorrect?

29Chemical Kinetics

For an elementary reaction, \(X(g) \longrightarrow Y(g)+Z(g)\), the \(t_{1 / 2}\) is \(10 \mathrm{~min}\). In what period of time would the concentration of \(X\) be reduced to \(10 \%\) of its original concentration?

30Chemical Kinetics

For a \(A+B \rightarrow\) products, the rate of the reaction is given by rate \(=k[A][B]^2\). The units of rate constant \((k)\) will be

31Chemical Kinetics

If the rate constant for a first order reaction is \(2.303 \times 10^{-3} \mathrm{~s}^{-1}\). Find the time required to reduce \(4 \mathrm{~g}\) of the reactant to \(0.2 \mathrm{~g}\).