Q. No.| 1. | \(2SO_{2 (g)} + O_{2(g)} \rightleftharpoons 2SO_3(g)\) |
| 2. | \(C_{(s) }+ H_2O_{(g)} \rightleftharpoons CO_{(g)} + H_{2(g)}\) |
| 3. | \(CaCO_{3(s)} \rightleftharpoons CaO_{(s)} + CO_{2(g)}\) |
| 4. | \(NH_4HS_{(s)} \rightleftharpoons NH_{3(s)} + H_2S_{(g)}\) |
At a particular temperature and atmospheric pressure, the solid and liquid phases of a pure substance can exist in equilibrium. Choose the terms which define this temperature:
(a) Normal melting point
(b) Equilibrium temperature
(c) Boiling point
(d) Freezing point
Choose the correct option:
| 1. | (a, b) | 2. | (b, c) |
| 3. | (c, d) | 4. | (a, d) |
Match the following equilibria with the corresponding condition.
| A. | LiquidVapour | 1. | Saturated solution |
| B. | SolidLiquid | 2. | Boiling point |
| C. | SolidVapour | 3. | Sublimation point |
| D. | Solute (s)Solute (solution) | 4. | Melting point |
| 5. | Unsaturated solution |
Codes:
| A | B | C | D | |
| 1. | 2 | 4 | 3 | 1 |
| 2. | 1 | 2 | 3 | 5 |
| 3. | 5 | 4 | 3 | 2 |
| 4. | 4 | 5 | 3 | 2 |
| 1. | Equilibrium is possible only in a closed system at a constant temperature. |
| 2. | All measurable properties of the system remain constant. |
| 3. | All the physical processes stop at equilibrium. |
| 4. | The opposing processes occur at the same rate and there is a dynamic but stable condition. |
1. \(\dfrac14 \)
2. \(\dfrac12 \)
3. \(1 \)
4. None of the above
Consider the following reaction taking place in 1L capacity container at 300 K.
\(\mathrm{A +B \rightleftharpoons C+D }\)
If one mole each of A and B are present initially and at equilibrium 0.7 mol of C is formed, then the equilibrium constant \((K_c) \) for the reaction is:
| 1. | 9.7 | 2. | 1.2 |
| 3. | 6.2 | 4. | 5.4 |
The following concentrations were obtained for the formation of NH3 from N2 and H2 at equilibrium at 500K.
[N2] = 1.5 × 10–2M. [H2] = 3.0 ×10–2 M and
[NH3] = 1.2 ×10–2M.
The equilibrium constant value is:
| 1. | 3.55 × 102
|
2. | 20.6 × 103
|
| 3. | 2.06 × 104
|
4. | 10.6 × 104 |
At equilibrium, the concentrations of N2=3.0 × 10–3M, O2 = 4.2 × 10–3M and NO= 2.8 × 10–3M in a sealed vessel at 800K. The value of Kc for the reaction given below is:
N2(g) + O2(g) 2NO(g)
1. 0.622
2. 6.22
3. 0.562
4. 0.662
PCl5, PCl3 and Cl2 are at equilibrium at 500 K and having concentrations 1.59M PCl3, 1.59M Cl2 and 1.41 M PCl5. The value of Kc for the reaction, PCl5 PCl3 + Cl2 is:
1. 0.179
2. 17.9
3. 1.79
4. 179
The value of Kc = 4.24 at 800K for the reaction,
CO(g) + H2O(g) CO2 (g) + H2 (g)
If only CO and H2O are present initially at concentrations of 0.10M each.
The equilibrium concentrations of CO2, and CO are-
1. 0.067 M; 0.033 M
2. 0.76 M; 0.029 M
3. 0.65 M; 0.027 M
4. 0.061 M; 0.30 M
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