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Q. No.Consider the given reaction:
\(\mathrm{PCl}_5=\mathrm{PCl}_3+\mathrm{Cl}_2\)
At equilibrium 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
Subtopic: Kp, Kc & Factors Affecting them |
89%
Level 1: 80%+
NEET - 2024
Hints
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 \(R:8.314~\text{J K}^{-1}\text{mol}^{-1}\)):
\(\mathrm{2NOCl_\text{(g)}\rightleftharpoons2NO_{\text{(g)}}+Cl_{2{\text{(g)}}}}\)
the value of the equilibrium constant is \(3.0\times10^{-6} \) at \(1000~K.\) Find \(K_p\) for the reaction at this temperature (Given \(R:8.314~\text{J K}^{-1}\text{mol}^{-1}\)):
| 1. | \(1.493\) | 2. | \(2.494\times10^{-2}\) |
| 3. | \(3.0\times10^{-6}\) | 4. | \(2.494\times10^{-4}\) |
Subtopic: Kp, Kc & Factors Affecting them |
78%
Level 2: 60%+
NEET - 2024
Hints
Consider the following reaction in a sealed vessel at equilibrium:
\(2 \text{NO}_{(\text{g})} \rightleftharpoons \text{N}_{2(\text{g})} +\text{O}_{2\text{(g)}}\)
[Given: \(\text{N}_2=3.0 \times 10^{-3} \text{M}, \text{O}_2=4.2 \times 10^{-3} \text{M}\) and \(\text{NO}=2.8 \times 10^{-3} \text M\)]
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. 0.00717
3. 0.717
4. 0.00889
\(2 \text{NO}_{(\text{g})} \rightleftharpoons \text{N}_{2(\text{g})} +\text{O}_{2\text{(g)}}\)
[Given: \(\text{N}_2=3.0 \times 10^{-3} \text{M}, \text{O}_2=4.2 \times 10^{-3} \text{M}\) and \(\text{NO}=2.8 \times 10^{-3} \text M\)]
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. 0.00717
3. 0.717
4. 0.00889
Subtopic: Introduction To Equilibrium |
Level 3: 35%-60%
NEET - 2024
Hints
In which of the following equilibria,\(\text{K}_\text{p}\) and \(\text{K}_\text{c}\) are NOT equal?
| 1. | \(\mathrm{H}_{2(\mathrm{~g})}+\mathrm{I}_{2(\mathrm{~g})} \rightleftharpoons 2 \mathrm{HI}_{(\mathrm{g})}\) |
| 2. | \(\mathrm{CO}_{(\mathrm{g})}+\mathrm{H}_2 \mathrm{O}_{(\mathrm{g})} \rightleftharpoons \mathrm{CO}_{2(\mathrm{~g})}+\mathrm{H}_{2(\mathrm{~g})}\) |
| 3. | \(2 \mathrm{BrCl}_{(\mathrm{g})} \rightleftharpoons \mathrm{Br}_{2(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}\) |
| 4. | \(\mathrm{PCl}_{5(\mathrm{~g})} \rightleftharpoons \mathrm{PCl}_{3(\mathrm{~g})}+\mathrm{Cl}_{2(\mathrm{~g})}\) |
Subtopic: Kp, Kc & Factors Affecting them |
81%
Level 1: 80%+
NEET - 2024
Hints
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 the 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?
At a given time, the composition of the 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. |
Subtopic: Kp, Kc & Factors Affecting them | Le Chatelier's principle |
60%
Level 2: 60%+
NEET - 2024
Hints
Which of the following acids will dissociate to the greatest extent (in water)?
1. HCN (hydrocyanic acid), Ka = 6.2 × 10−10
2. HNCO (cyanic acid), Ka = 3.3 × 10−4
3. HClO (hypochlorous acid), Ka = 2.9 × 10−8
4. HBrO (hypobromous acid), Ka = 2.2 × 10−9
1. HCN (hydrocyanic acid), Ka = 6.2 × 10−10
2. HNCO (cyanic acid), Ka = 3.3 × 10−4
3. HClO (hypochlorous acid), Ka = 2.9 × 10−8
4. HBrO (hypobromous acid), Ka = 2.2 × 10−9
Subtopic: Ionisation Constant of Acid, Base & Salt |
79%
Level 2: 60%+
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The molecule that can behave as a Bronsted-Lowry acid but not a Lewis acid is:
1. CF4
2. NaAlCl4
3. HF
4. Br2
1. CF4
2. NaAlCl4
3. HF
4. Br2
Subtopic: Ionisation Constant of Acid, Base & Salt |
74%
Level 2: 60%+
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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
1. 1.84
2. 2.90 × 10−3
3. 1.81 × 10−6
4. 7.56 × 10−23
Subtopic: Solubility Product |
Level 3: 35%-60%
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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.
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.
Subtopic: Le Chatelier's principle |
65%
Level 2: 60%+
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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.
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.
Subtopic: Solubility Product |
62%
Level 2: 60%+
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