Chemical Equilibrium PYQs - Last 5 Years
AP EAPCET / Chemistry / Physical Chemistry / 31 recent questions
ChemistryPhysical Chemistry2021-2025
Practice 31 AP EAPCET Chemistry questions from Chemical Equilibrium. Use the year-wise and type-wise breakdown to prioritize recent PYQs, then continue into the question list below.
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Last 5 Years Chemical Equilibrium Questions
Showing 31 of 31 filtered questions.
1Chemical Equilibrium
Consider the following equilibrium reaction in gaseous state at $T(\mathrm{~K})$.
\(A+2 B \rightleftharpoons 2 C+D\)
The initial concentration of $B$ is 1.5 times that of $A$. At equilibrium, the concentrations of $A$ and $B$ are equal. T...
\(A+2 B \rightleftharpoons 2 C+D\)
The initial concentration of $B$ is 1.5 times that of $A$. At equilibrium, the concentrations of $A$ and $B$ are equal. T...
MCQ+1 / -02025
2Chemical Equilibrium
At $T(\mathrm{~K}), K_c$ value of $A \mathrm{O}_2(g)+B \mathrm{O}_2(g) \rightleftharpoons A \mathrm{O}_3(g)+B O(g)$ is 16 . In a closed 1 L flask, one mole each of $A O_2, B O_2 A \mathrm{O}_3$ and $B \mathrm{O}$ are taken and heated to $T(...
MCQ+1 / -02025
3Chemical Equilibrium
For the following given equilibrium reaction $\frac{K_c}{K_p}$ is equal to 1076 at $T(\mathrm{~K})$. What is the value of $T$ (in K )?
$$ \begin{aligned} & \left(R=0.082 \mathrm{~L}-\mathrm{atm} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right) \\...
$$ \begin{aligned} & \left(R=0.082 \mathrm{~L}-\mathrm{atm} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}\right) \\...
MCQ+1 / -02025
4Chemical Equilibrium
At $T(\mathrm{~K})$, consider the following gaseous reaction, which is in equilibrium.
\(\mathrm{N}_2 \mathrm{O}_5 \rightleftharpoons 2 \mathrm{NO}_2+\frac{1}{2} \mathrm{O}_2\)
What is the fraction of $\mathrm{N}_2 \mathrm{O}_5$ decompose...
\(\mathrm{N}_2 \mathrm{O}_5 \rightleftharpoons 2 \mathrm{NO}_2+\frac{1}{2} \mathrm{O}_2\)
What is the fraction of $\mathrm{N}_2 \mathrm{O}_5$ decompose...
MCQ+1 / -02025
5Chemical Equilibrium
Consider the following gaseous equilibrium reactions (I), (II) and (III) with equilibrium constants $K_1, K_2$ and $K_3$ respectively
(I) $\frac{1}{2} \mathrm{~N}_2+\frac{3}{2} \mathrm{H}_2 \rightleftharpoons \mathrm{NH}_3$
(II) $2 \mathrm{...
(I) $\frac{1}{2} \mathrm{~N}_2+\frac{3}{2} \mathrm{H}_2 \rightleftharpoons \mathrm{NH}_3$
(II) $2 \mathrm{...
MCQ+1 / -02025
6Chemical Equilibrium
At 298 K , the value of $K_p$ for $\mathrm{N}_2 \mathrm{O}_4(g) \rightleftharpoons 2 \mathrm{NO}_2(g)$ is 0.113 atm . The partial pressure of $\mathrm{N}_2 \mathrm{O}_4$ at equilibrium is 0.2 atm . What is the partial pressure (in atm) of $...
MCQ+1 / -02025
7Chemical Equilibrium
At $T(\mathrm{~K}), K_C$ value for
$\mathrm{AO}_2(\mathrm{~g})+\mathrm{BO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{AO}_3(\mathrm{~g})+\mathrm{BO}(\mathrm{g})$ is 16 . In a closed 1 L flask, one mole each of $A \mathrm{O}_2, B \mathrm{O}_2...
$\mathrm{AO}_2(\mathrm{~g})+\mathrm{BO}_2(\mathrm{~g}) \rightleftharpoons \mathrm{AO}_3(\mathrm{~g})+\mathrm{BO}(\mathrm{g})$ is 16 . In a closed 1 L flask, one mole each of $A \mathrm{O}_2, B \mathrm{O}_2...
MCQ+1 / -02025
8Chemical Equilibrium
At $T(\mathrm{~K})$, the following gaseous equilibrium is established.
\(W+X \rightleftharpoons Y+Z\)
The initial concentration of $W$ is two times to the initial concentration of $X$. The system is heated to $T(\mathrm{~K})$ to establish...
\(W+X \rightleftharpoons Y+Z\)
The initial concentration of $W$ is two times to the initial concentration of $X$. The system is heated to $T(\mathrm{~K})$ to establish...
MCQ+1 / -02025
9Chemical Equilibrium
At 298 K , the value of $K_c$ for the following reaction is $x \mathrm{~mol} \mathrm{~L}^{-1}$.
What is the approximate $K_{\mathrm{P}}$ value for this reaction?
$$ \begin{array}{r} \left(R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1}...
What is the approximate $K_{\mathrm{P}}$ value for this reaction?
$$ \begin{array}{r} \left(R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{~mol}^{-1}...
MCQ+1 / -02025
10Chemical Equilibrium
The following equilibrium is established at STP.
\(B_2(g) \rightleftharpoons 2 B(g)\)
Atoms of $B$ occupy $20 \%$ of total volume at STP. The total pressure of the system is 1 bar. What is its $K_p$ ? $($ STP volume $=22.7 \mathrm{~L})$
\(B_2(g) \rightleftharpoons 2 B(g)\)
Atoms of $B$ occupy $20 \%$ of total volume at STP. The total pressure of the system is 1 bar. What is its $K_p$ ? $($ STP volume $=22.7 \mathrm{~L})$
MCQ+1 / -02025
11Chemical Equilibrium
At $293 \mathrm{~K}, \Delta_r G^{\circ}$ for the following reaction is $165.469 \mathrm{~kJ} \mathrm{~mol}^{-1}$.
\(\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \longrightarrow \mathrm{O}_3(\mathrm{~g})\)
What is the equilibrium constant for thi...
\(\frac{3}{2} \mathrm{O}_2(\mathrm{~g}) \longrightarrow \mathrm{O}_3(\mathrm{~g})\)
What is the equilibrium constant for thi...
MCQ+1 / -02025
12Chemical Equilibrium
At $300 \mathrm{~K}, K_C$ for the reaction.
\(A_2 B_2(g) \rightleftharpoons A_2(g)+B_2(g)\)
is $100 \mathrm{~mol} \mathrm{~L}^{-1}$, What is its $K_p$ (in atm ) at the same temperature ? $\left(R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{...
\(A_2 B_2(g) \rightleftharpoons A_2(g)+B_2(g)\)
is $100 \mathrm{~mol} \mathrm{~L}^{-1}$, What is its $K_p$ (in atm ) at the same temperature ? $\left(R=0.082 \mathrm{~L} \mathrm{~atm} \mathrm{...
MCQ+1 / -02024
13Chemical Equilibrium
At equilibrium of the reaction,
\(A_2(g)+B_2(g) \rightleftharpoons 2 A B(g)\)
The concentrations of $A_2, B_2$ and $A B$ respectively are $15 \times 10^{-3} \mathrm{M}, 2.1 \times 10^{-3} \mathrm{M}$, and $1.4 \times 10^{-3} \mathrm{M}$ i...
\(A_2(g)+B_2(g) \rightleftharpoons 2 A B(g)\)
The concentrations of $A_2, B_2$ and $A B$ respectively are $15 \times 10^{-3} \mathrm{M}, 2.1 \times 10^{-3} \mathrm{M}$, and $1.4 \times 10^{-3} \mathrm{M}$ i...
MCQ+1 / -02024
14Chemical Equilibrium
$K_C$ for the reaction,
$A_2(g) \stackrel{T(\mathrm{~K})}{\rightleftharpoons} B_2(\mathrm{~g})$
is 39.0. In a closed one litre flask, one mole of $A_2(g)$ was heated to $T(\mathrm{~K})$. What are the concentrations of $A_2(g)$ and $B_2(g)...
$A_2(g) \stackrel{T(\mathrm{~K})}{\rightleftharpoons} B_2(\mathrm{~g})$
is 39.0. In a closed one litre flask, one mole of $A_2(g)$ was heated to $T(\mathrm{~K})$. What are the concentrations of $A_2(g)$ and $B_2(g)...
MCQ+1 / -02024
15Chemical Equilibrium
15 moles of $\mathrm{H}_2$ and 5.2 moles of $\mathrm{I}_2$ are mixed and allowed to attain equilibrium at 773 K . At equilibrium, the number of moles of HI is found to be 10 . The equilibrium constant for the dissociation of HI is
MCQ+1 / -02024
16Chemical Equilibrium
$K_C$ for the reaction, $A_2(g) \stackrel{T(\mathrm{~K})}{\rightleftharpoons} B_2(g)$ is 99.0 . In a 1 L closed flask two moles of $B_2(g)$ is heated to $T(\mathrm{~K})$. What is the concentration of $B_2(g)\left(\right.$ in $\left.\mathrm{...
MCQ+1 / -02024
17Chemical Equilibrium
At $T(\mathrm{~K})$, the equilibrium constant for the reaction $\mathrm{H}_2(g)+\mathrm{Br}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{HBr}(\mathrm{g})$is $1.6 \times 10^5$. If 10 bar of HBr is introduced into a sealed vessel at $T(\mathrm...
MCQ+1 / -02024
18Chemical Equilibrium
$K_{\mathrm{c}}$ for the following reaction is 99.0
\(A_2(g) \stackrel{T(K)}{\rightleftharpoons} B_2(g)\)
In a one litre flask, 2 moles of $A_2$ was heated to $T(\mathrm{~K})$ and the above equilibrium is reached. The concentration at equ...
\(A_2(g) \stackrel{T(K)}{\rightleftharpoons} B_2(g)\)
In a one litre flask, 2 moles of $A_2$ was heated to $T(\mathrm{~K})$ and the above equilibrium is reached. The concentration at equ...
MCQ+1 / -02024
19Chemical Equilibrium
At $27^{\circ} \mathrm{C}$, the degree of dissociation of weak acid ( $\mathrm{H} A$ ) in its 0.5 M aqueous solution is $1 \%$. Its $K_e$, value is approximately
MCQ+1 / -02024
20Chemical Equilibrium
At $T(\mathrm{~K}), K_c$ for the reaction $A_2(g) \rightleftharpoons B_2(g)$ is 99.0 . Two moles of $A_2(s)$ was heated to $T(\mathrm{~K})$ in a 1 L . closed flask to reach the above equilibrium. What are the concentrations (in mol $\mathrm...
MCQ+1 / -02024
21Chemical Equilibrium
One mole $\mathrm{H}_2 \mathrm{O}(g)$ and one mole $\mathrm{CO}(g)$ are taken in 1 L flask and heated to 725 K . At equilibrium, $40 \%$ (by mass) of water reacted with $\mathrm{CO}(g)$ as follows
$$ \mathrm{H}_2 \mathrm{O}(g)+\mathrm{CO}(g...
$$ \mathrm{H}_2 \mathrm{O}(g)+\mathrm{CO}(g...
MCQ+1 / -02023
22Chemical Equilibrium
At $T(\mathrm{~K})$, the equilibrium constant for $A(g) \rightleftharpoons B(g)$ is $10^{-2}$. If rate of forward reaction is $0.025 \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1}$. The rate of backward reaction (in $\mathrm{mol} \mathrm{L...
MCQ+1 / -02023
23Chemical Equilibrium
At $T(\mathrm{~K})$, the equilibrium constant for the reaction $a A(g) \rightleftharpoons b B(g)$ is $K_c$. If the reaction takes place in the following form $2 a A(g) \rightleftharpoons 2 b B(g)$, its equilibrium constant is $K^{\prime}{ }...
MCQ+1 / -02023
24Chemical Equilibrium
At 500 K , for the reaction \(\mathrm{N}_2(\mathrm{~g})+3 \mathrm{H}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NH}_3(\mathrm{~g})\), the \(K_p\) is \(0.036 \mathrm{~atm}^{-2}\). What is its \(K_C\) in \(\mathrm{L}^2 \mathrm{~mol}^{-1}\) ?...
MCQ+1 / -02022
25Chemical Equilibrium
The formation of ammonia from its constituent elements is an exothermic reaction. The effect of increased temperature on the reaction equilibrium is
MCQ+1 / -02022
26Chemical Equilibrium
Le-Chatelier's principle is not applicable to
MCQ+1 / -02021
27Chemical Equilibrium
At \(60^{\circ} \mathrm{C}\), dinitrogen tetroxide is dissociated. Find it's standard free energy change at this temperature and one atmosphere. [Given \(\log 1.33=0.1239\)]
MCQ+1 / -02021
28Chemical Equilibrium
Which among the following denotes the correct relationship between \(K_p\) and \(K_c\) for the reaction, \(2 A(g) \rightleftharpoons B(g)+C(g)\)
MCQ+1 / -02021
29Chemical Equilibrium
For the reaction \(\mathrm{SO}_2(g)+\frac{1}{2} \mathrm{O}_2(g) \rightleftharpoons \mathrm{SO}_3(g)\), the percentage yield of product at different pressure is shown in the figure. Then, which among the following is true?
MCQ+1 / -02021
30Chemical Equilibrium
Standard entropies of \(X_2, Y_2\) and \(X Y_3\) are 60, 40 and \(50 \mathrm{JK}^{-1} \mathrm{~mol}^{-1}\) respectively. At what temperature, the following reaction will be at equilibrium? [given: \(\Delta H \Upsilon=-30 \mathrm{~kJ}\)]
$$\...
$$\...
MCQ+1 / -02021
31Chemical Equilibrium
Using the data provided, find the value of equilibrium constant for the following reaction at \(298 \mathrm{~K}\) and \(1 \mathrm{~atm}\) pressure.
$$\begin{aligned}
\mathrm{NO}(g)+\frac{1}{2} \mathrm{O}_2(g) \rightleftharpoons & \mathrm{NO...
$$\begin{aligned}
\mathrm{NO}(g)+\frac{1}{2} \mathrm{O}_2(g) \rightleftharpoons & \mathrm{NO...
MCQ+1 / -02021