Consider the following reaction in a sealed vessel at equilibrium with concentrations of \(\text{N}_2=3.0 \times 10^{-3} \text{M}, \text{O}_2=4.2 \times 10^{-3} \text{M}\) and \(\text{NO}=2.8 \times 10^{-3}\) \(2 \text{NO}_{(\text{g})} \rightleftharpoons \text{N}_{2(\text{g})} +\text{O}_{2\text{(g)}}\)
If 0.1 mol L-1 of NO(g) is taken in a closed vessel, what will be the degree of dissociation (\(\alpha\)) of NO(g) at equilibrium?
1. 0.0889
2. 0.8889
3. 0.717
4. 0.00889
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Subtopic: Ionisation Constant of Acid, Base & Salt |
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Consider the reaction in equilibrium \(\mathrm{PCl}_5=\mathrm{PCl}_3+\mathrm{Cl}_2\)
at \(500 \mathrm{~K} .\) The concentration of \(\mathrm{PCl}_5=1.40~ \mathrm{M} \text {, }\) concentration of \(\mathrm{Cl}_2=1.60~ \mathrm{M} \text {, }\) concentration of \(\mathrm{PCl}_3=1.60 \mathrm{M}\). Calculate \(K_c\):
1. 2.00
2. 2.6
3. 1.83
4. 3.4
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Subtopic: Kp, Kc & Factors Affecting them |
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For the equilibrium \(\mathrm{2NOCl_\text{(g)}\rightleftharpoons2NO_{\text{(g)}}+Cl_{2{\text{(g)}}}}\)
the value of the equilibrium constant is \(3.0\times10^{-6} \) at \(1000~K.\) Find \(K_p\) for the reaction at this temperature (Given \(R:8.314~\text{J K}^{-1}\text{mol}^{-1}\)):
For the reaction \(2 \mathrm{~A} \rightleftharpoons \mathrm{B}+\mathrm{C}, \mathrm{K}_{\mathrm{c}}=4 \times 10^{-3}\) . At a given time, the composition of reaction mixture is : \([\mathrm{A}]=[\mathrm{B}]=[\mathrm{C}]=2 \times 10^{-3} \mathrm{M} \text {. }\)
In light of the above facts, which of the following is correct?
1.
Reaction has a tendency to go in the forward direction.
2.
Reaction has a tendency to go in the backward direction.
3.
Reaction has gone to completion in the forward direction.
4.
Reaction is at an equilibrium.
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Subtopic: Kp, Kc & Factors Affecting them | Le Chatelier's principle |
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If Ksp of KI is 1.45 × 10−6 in propanol at 25°C, what would Ksp of KI be in propane at the same temperature?
1. 1.84
2. 2.90 × 10−3
3. 1.81 × 10−6
4. 7.56 × 10−23
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Subtopic: Solubility Product |
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Given the following equilibrium:
N2(g) + 3H2(g) \(\rightleftharpoons\) 2NH3(g), ∆H = −91.8 kJ
How would an increase in temperature affect the concentration of N2 at equilibrium?
1. The concentration of N2 will increase because of an increase in Keq.
2. The concentration of N2 will decrease because of an increase in Keq.
3. The concentration of N2 will increase because of a decrease in Keq.
4. The concentration of N2 will remain unchanged.
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Subtopic: Le Chatelier's principle |
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The value of the solubility product for copper(I) chloride is Ksp = 1.2 × 10−6. Under normal conditions, the maximum concentration of an aqueous CuCl solution will be:
1. Less than 10−6 M.
2. Greater than 10−6 M and less than 10−4 M.
3. Greater than 10−4 M and less than 102 M.
4. Greater than 10−2 M and less than 10−1 M.
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Subtopic: Solubility Product |
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