Which of the following parameters can determine the higher yield of \(\mathrm{NO}\) in the reaction, \(\mathrm{N}_2(\mathrm{~g})+\mathrm{O}_2(\mathrm{~g}) \rightleftharpoons 2 \mathrm{NO}(\mathrm{g})\) ?
\([ Given: \Delta \mathrm{H}\) of the reaction \(=+180.7 \mathrm{~kJ} \mathrm{~mol}^{-1} ]\)
A. higher temperature
B. lower temperature
C. higher concentration of \(\mathrm{N}_2\)
D. higher concentration of \(\mathrm{O}_2\)

Choose the correct answer from the options given below:
1. B, C, D only
2. A, C, D only
3. A, D only
4. B, C only
Subtopic:  Le Chatelier's principle |
 69%
Level 2: 60%+
NEET - 2025
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Please attempt this question first.

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?
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 |
 58%
Level 3: 35%-60%
NEET - 2024
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Consider the given reaction at equilibrium:
\(\mathrm{N_2(g) +3H_2(g) \rightleftharpoons 2NH_3(g), \Delta H=-Q}\)
Reaction is favoured in forward direction by:
1. Use of catalyst 
2. Decreasing concentration of \(\mathrm{N_2}\)
3. Low pressure, high temperature and high concentration of ammonia
4. High pressure, low temperature and higher concentration of \(\mathrm{H_2}\)
Subtopic:  Le Chatelier's principle |
 82%
Level 1: 80%+
NEET - 2024
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Mark the conditions that favour the maximum product formation in the given reaction.
 A2 (g)  + B2 (g)   X2 (g), rH = -X k J  

1. Low temperature and high pressure.
2. Low temperature and low pressure.
3. High temperature and high pressure.
4. High temperature and low pressure.

Subtopic:  Le Chatelier's principle |
 80%
Level 1: 80%+
NEET - 2018
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Consider the reversible exothermic reaction:

N2(g) + 3H2(g) \(\rightleftharpoons\) 2NH3(g) + heat 

Under which of the following conditions will the equilibrium shift in the forward direction (towards the formation of ammonia)?

1. Increasing the concentration of \(N H_3 ( g )\)
2. Decreasing the pressure
3. Decreasing the concentration of \(N_2(g) ~and~H_2(g)\)
4. Increasing the pressure and decreasing the temperature

Subtopic:  Le Chatelier's principle |
 86%
Level 1: 80%+
AIPMT - 2014
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What conditions favor the formation of 2XY₄(g) in the reaction X₂(g) + 4Y₂(g) ⇋ 2XY₄(g), considering that the enthalpy change (ΔH) is negative?

1.  Low pressure and low temperature

2.  High temperature and low pressure

3.  High pressure and low temperature

4.  High temperature and high pressure

Subtopic:  Le Chatelier's principle |
 78%
Level 2: 60%+
AIPMT - 2011
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