Q. No.| 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. |
For the given reaction:
H2NCOONH4 (s) \( \rightleftharpoons\) 2NH3 (g) + CO2 (g),
total pressure at equilibrium is found to be 18 atmospheres. The value of Kp for the above equilibrium will be:
1. 72 atm3
2. 144 atm3
3. 432 atm3
4. 864 atm3
| 1. | Equilibrium between water vapour and liquid water in a closed container |
| 2. | Equilibrium attained during acid catalysed hydrolysis of ethyl acetate |
| 3. | Equilibrium between solid Ca(OH)2 and its saturated solution |
| 4. | Equilibrium attained on heating solid CaCO3 in a closed container |
The value of for the reaction is less than zero. Formation of will be favoured at:
1. Low pressure and low temperature
2. High temperature and low pressure
3. High pressure and low temperature
4. High temperature and high pressure
1. \(N_2 (g) + 3H_2 (g)\rightleftharpoons 2NH_3 (g)\)
2. \(PCl_5 (g) \rightleftharpoons PCl_3 (g) + Cl_2 (g)\)
3. \(H_2(g) + I_2 (g) \rightleftharpoons 2HI (g)\)
4. None of the above.
The equilibrium constant (Kc ) and the sign of the enthalpy change for the reaction are:
\(K_c = \frac{[P]^2}{[Q][R]3}~~~~~~\Delta H ~ is ~negative \)
Assuming that all other conditions remain constant, a change in which factor results in an increase of the value of the equilibrium constant, Kc?
1. an increase in pressure
2. use of a suitable catalyst
3. a decrease in temperature
4. an increase in temperature
The following equilibrium constants are given:
N2 + 3H2 ⇌ 2NH3; K1
N2 + O2 ⇌ 2NO; K2
H2 + 1/2O2 ⇌ H2O; K3
The equilibrium constant for the oxidation of NH3 by oxygen to give NO is:
1.
2.
3.
4.
Hydrolysis of sucrose gives,
Sucrose + H2O Glucose + Fructose
The equilibrium constant Kc for the reaction is 2 ×1013 at 300K. The value of ∆G⊖ at 300K is:
1. – 5.64 ×104 J mol–1
2. – 7.64 ×104 J mol–1
3. – 6.64 ×104 J mol–1
4. – 8.64 ×104 J mol–1
For the equilibrium,
2NOCl(g) 2NO(g) + Cl2(g)
the value of the equilibrium constant, Kc is 3.75 × 10–6 at 1069 K.
The value of Kp for the reaction at this temperature is:
1. 0.048
2. 0.67
3. 0.29
4. 0.033
For the reaction, A+B 3C at 25 C, a 3 litre vessel contains 1, 2, and 4 mole of A, B and C respectively. If Kc for the reaction is 10, then the reaction will proceed in:
1. forward direction
2. backward direction
3. in either direction
4. in equilibrium
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