Equilibrium
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Match Column (I) with Column (II). Column I Column II-
(i) Equilibrium
(a) ∆G > 0, K < 1
(ii) Spontaneous reaction
(b) ∆G = 0
(iii) Nonspontaneous reaction
(c) ∆Gᶱ = 0
(d) ∆G < 0, K > 1
Match Column (I) with Column (II). Column I Column II-
|
(i) Equilibrium |
(a) ∆G > 0, K < 1 |
|
(ii) Spontaneous reaction |
(b) ∆G = 0 |
|
(iii) Nonspontaneous reaction |
(c) ∆Gᶱ = 0 |
|
(d) ∆G < 0, K > 1 |
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i) →c; (ii) → (d); (iii) → (a).
Upvote 
Match the following graphical variation with their description-
A B
(a) Variation in product concentration with time
(b) Reaction at equilibrium
(c) Variation in reactant concentration with time
Match the following graphical variation with their description-
A B
|
|
(a) Variation in product concentration with time |
|
(b) Reaction at equilibrium |
 |
(c) Variation in reactant concentration with time |
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i) → (c); (ii) → (a); (iii) → (b).
Upvote Match the following species with the corresponding conjugate acid.
Species
Conjugate acid
(i) NH3
(a) CO32–
(ii) HCO3-
(b) NH4
(iii) H2O
(c) H3O+
(iv) HSO4-
(d) H2SO4
(e) H2CO3
Match the following species with the corresponding conjugate acid.
|
Species |
Conjugate acid |
|
(i) NH3 |
(a) CO32– |
|
(ii) HCO3- |
(b) NH4 |
|
(iii) H2O |
(c) H3O+ |
|
(iv) HSO4- |
(d) H2SO4 |
|
|
(e) H2CO3 |
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i) → (b); (ii) → (e); (iii) → (c); (iv) → (d)
Upvote Match standard free energy of the reaction with the corresponding equilibrium constant.
(i) ∆Gᶱ > 0
(a) K > 1
(ii) ∆Gᶱ < 0
(b) K = 1
(iii) ∆Gᶱ = 0
(c) K = 0
(d) K < 1
Match standard free energy of the reaction with the corresponding equilibrium constant.
|
(i) ∆Gᶱ > 0 |
(a) K > 1 |
|
(ii) ∆Gᶱ < 0 |
(b) K = 1 |
|
(iii) ∆Gᶱ = 0 |
(c) K = 0 |
|
|
(d) K < 1 |
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i) → (d); (ii) → (a); (iii) → (b).
Upvote For the reaction : N2(g) + 3H2(g) ? 2NH3(g)
Equilibrium constant Kc =
Some reactions are written below in Column I and their equilibrium constants in terms of Kc are written in Column II. Match the following reactions with the corresponding equilibrium constant.
Column I (Reaction)
Column II (Equilibrium constant)
(i) 2N2(g) + 6H2(g) ⇌ 4NH3(g)
(a) 2Kc
(ii) 2NH3(g) ⇌N2(g) + 3H2(g)
(b) Kc
(iii) N2(g) + 2H2(g) ⇌ NH3(g)
(c)
(d) K2c
For the reaction : N2(g) + 3H2(g) ? 2NH3(g)
Equilibrium constant Kc =
Some reactions are written below in Column I and their equilibrium constants in terms of Kc are written in Column II. Match the following reactions with the corresponding equilibrium constant.
|
Column I (Reaction) |
Column II (Equilibrium constant) |
|
(i) 2N2(g) + 6H2(g) ⇌ 4NH3(g) |
(a) 2Kc |
|
(ii) 2NH3(g) ⇌N2(g) + 3H2(g) |
(b) Kc |
|
(iii) N2(g) + 2H2(g) ⇌ NH3(g) |
(c) |
|
|
(d) K2c |
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i) → (d); (ii) → (c); (iii) → (b)
Upvote Match the following equilibria with the corresponding condition.
(i) Liquid ⇌ Vapour
(a) Saturated solution
(ii) Solid ⇌ Liquid
(b) Boiling point
(iii) Solid ⇌ Vapour
(c) Sublimation point
(iv) Solute⇌ Solute(solution)
(d) Melting point
(e) Unsaturated solution
Match the following equilibria with the corresponding condition.
|
(i) Liquid ⇌ Vapour |
(a) Saturated solution |
|
(ii) Solid ⇌ Liquid |
(b) Boiling point |
|
(iii) Solid ⇌ Vapour |
(c) Sublimation point |
|
(iv) Solute⇌ Solute(solution) |
(d) Melting point |
|
(e) Unsaturated solution |
This is a Matching Type Questions as classified in NCERT Exemplar
Ans: (i) → (b); (ii) → (d); (iii) → (c); (iv) → (a).
Upvote At a particular temperature and atmospheric pressure, the solid and liquid phases of a pure substance can exist in equilibrium. Which of the following term defines this temperature?
(i) Normal melting point
(ii) Equilibrium temperature
(iii) Boiling point
(iv) Freezing point
At a particular temperature and atmospheric pressure, the solid and liquid phases of a pure substance can exist in equilibrium. Which of the following term defines this temperature?
(i) Normal melting point
(ii) Equilibrium temperature
(iii) Boiling point
(iv) Freezing point
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: options (i) and (iv)
Ice and water are in equilibrium only at particular temperature and pressure. For any pure substance at atmospheric pressure, the temperature at which the solid and liquid phases are at equilibrium is called
Upvote In the following questions two or more options may be correct.
For the reaction N2O4 (g) ⇌2NO2 (g), the value of K is 50 at 400 K and 1700 at 500 K. Which of the following options is correct?
(i) The reaction is endothermic
(ii) The reaction is exothermic
(iii) If NO2 (g) and N2O4 (g) are mixed at 400 K at partial pressures 20 bar and 2 bar respectively, more N2O4 (g) will be formed.
(iv) The entropy of the system increases.
In the following questions two or more options may be correct.
For the reaction N2O4 (g) ⇌2NO2 (g), the value of K is 50 at 400 K and 1700 at 500 K. Which of the following options is correct?
(i) The reaction is endothermic
(ii) The reaction is exothermic
(iii) If NO2 (g) and N2O4 (g) are mixed at 400 K at partial pressures 20 bar and 2 bar respectively, more N2O4 (g) will be formed.
(iv) The entropy of the system increases.
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans:, option (i), (iii) and (iv)
As, K increases with increase in temperature. K increases, it shows that the reaction must be endothermic. No. of molecules increases thus, there is increase in entropy.
Upvote In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?
(i) H2 (g) + I2 (g) ⇌ 2HI (g)
(ii) PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)
(iii) N2 (g) + 3H2 (g) ⇌2NH3 (g)
(iv) The equilibrium will remain unaffected in all the three cases.
In which of the following reactions, the equilibrium remains unaffected on addition of small amount of argon at constant volume?
(i) H2 (g) + I2 (g) ⇌ 2HI (g)
(ii) PCl5 (g) ⇌ PCl3 (g) + Cl2 (g)
(iii) N2 (g) + 3H2 (g) ⇌2NH3 (g)
(iv) The equilibrium will remain unaffected in all the three cases.
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: option (iv)
Since in all the given reaction, the volume is to be kept constant and an inert gas argon is added which will do not take part in reaction. So, the equilibrium will remain unaffected in all the given cases.
Upvote At 500 K, equilibrium constant, Kc , for the following reaction is 5.
(g) + (g) ⇌ HI (g)
What would be the equilibrium constant Kc for the reaction
2HI(g) ⇌ H2 (g) + I2 (g)
(i) 04
(ii) 4
(iii) 25
(iv) 5
At 500 K, equilibrium constant, Kc , for the following reaction is 5.
(g) + (g) ⇌ HI (g)
What would be the equilibrium constant Kc for the reaction
2HI(g) ⇌ H2 (g) + I2 (g)
(i) 04
(ii) 4
(iii) 25
(iv) 5
This is a Multiple Choice Questions as classified in NCERT Exemplar
Ans: option (i)
If the equation is multiplied by 2, the equilibrium constant for the new equation is the square of K it means we must do the square of 5 that is 25. Then and on reversing the reaction the value of the equilibrium
Upvote