Equilibrium constant for the given reaction is kc = 1020 at temperature 300 K,A(s) + 2B (aq.) 2C (s) + D (aq.)K = 1020 The equilibrium conc. of B starting with mixture of 1 mole of A and 1/3 mole/litre of B at 300 K is

(1) ~4×1011

(2) ~2×1010

(3) ~2×1011

(4) ~1010

Subtopic:  Kp, Kc & Factors Affecting them |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh
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10L box contain O3 and O2 at equilibrium at 2000 K. The ΔG° = –534.52 kJ at 8 atm equilibrium pressure.The following equilibrium is present in the container. 2O3(g) 3O2(g). The partial pressure of O3 will be (ln 10 = 2.3, R = 8.3 Jmole–1K–1):

(1) 8 ×104

(2) 22.62 × 10-7

(3) 9.71 × 10-6

(4) 9.71 × 10-2

Subtopic:  Kp, Kc & Factors Affecting them |
 64%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Solid ammonium carbamate dissociates to give ammonia and carbon dioxide as follows:

NH2COONH4(s) 2 NH3(g) + CO2(g) At equilibrium, ammonia is added such that partial pressures of NH3 now equals the original total pressure. Calculate the ratio of the total pressures now to the original total pressure.

(1) 3127

(2) 6040

(3) 319

(4) 6227

Subtopic:  Kp, Kc & Factors Affecting them |
 54%
From NCERT
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The reactions, PCl5 (g) PCl3(g) + Cl2(g) and COCl2(g) CO(g) + Cl2(g) are simultaneously in equilibrium in an equilibrium box at constant volume. A few moles of CO(g) are later introduced into the vessel. After some time, the new equilibrium concentration of

(1) PCl5 will remain unchanged

(2) Cl2 will be greater

(3) PCl5 will become less

(4) PCl5 will become greater

Subtopic:  Le Chatelier's principle |
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

In the Haber process for the industrial manufacture of ammonia involving the reaction, N2 + 3H2 2NH3 at 200 atm pressure in the presence of a catalyst, temperature of about 500°C. This is considered as optimum temperature for the process because

(1) yield is maximum at this temperature

(2) catalyst is active only at this temperature

(3) energy needed for the reaction is easily obtained at this temperature

(4) rate of the catalytic reaction is fast enough while the yield is also appreciable for this exothermic reaction at this temperature.

Subtopic:  Le Chatelier's principle |
 61%
From NCERT
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What is the minimum mass of CaCO3 (s), below which it decomposes completely, required to establish equilibrium in a 6.50 litre container for the reaction : [ KC = 0.05 mole/litre]

CaCO3 (s) CaO(s) + CO2(g)

(1) 32.5g

(2) 24.6 g

(3) 40.9g

(4) 8.0 gm

Subtopic:  Kp, Kc & Factors Affecting them |
 62%
From NCERT
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The value of kp for the reaction at 27°C Br2(l) + Cl2(g) 2BrCl(g) is '1 atom'. At equilibrium in a closed container partial pressure of BrCI gas is 0.1 atm and at this temperature the vapour pressure of Br2(l) is also 0.1 atm. Then what will be minimum moles of Br2(l) to be added to 1 mole of Cl2 , initially, to get above equilibrium situation :

(1) 106 moles

(2) 56moles

(3) 156moles

(4) 2 moles

Subtopic:  Kp, Kc & Factors Affecting them |
From NCERT
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5 mol PCI5(g) and one mole N2 gas is placed in a closed vessel. At equilibrium PCI5(g) decomposes 20% and total pressure in to the container is found to be 1 atm. The kP for equilibrium

PCl5(g) PCl3(g) + Cl2(g)

(1) 124atm

(2) 14atm

(3) 116atm

(4) 128atm

Subtopic:  Kp, Kc & Factors Affecting them |
From NCERT
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The degree of dissociation of water in a 0.1 M aqueous solution of HCl at a certain temperature t°C is 3.6 x 10–15. The temperature t must be :

(1) < 25°C

(2) = 25°C

(3) > 25°C

(4) insufficient data to predict

Subtopic:  Introduction To Equilibrium |
 51%
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Which one is the correct expression below for the solution containing 'n' number of weak acids?

(1) [H+]=i=1nKiCi

(2) [H+]=i=1nKiCi

(3) [H+]=i = 1nKiCi

(4) none of these

Subtopic:  Ionisation Constant of Acid, Base & Salt |
 75%
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