Question
For the reaction in equilibrium N _2( ~g )+3 H _2( ~g ) 2 NH _3( ~g ), H =- Q Reaction is favoured in forward direction by:
NEET
Chemistry
Chemical Equilibrium
2024
NEET 2024 (Re-NEET)
NEET Chemistry Question (2024) — Solution
Options
- A. use of catalyst
- B. decreasing concentration of N _2
- C. low pressure, high temperature and high concentration of ammonia
- D. high pressure, low temperature and higher concentration of H _2
Answer
D. high pressure, low temperature and higher concentration of H _2
Step-by-step solution
N _2( ~g )+3 H _2( ~g ) 2 NH _3( ~g ), H =- Q According to Le Chatelier's principle. - Exothermic reactions are favoured at low temperature. - Increase in pressure shifts the reaction in direction having lesser number of moles. Hence, the given reaction shifts forward on increasing pressure. - Increasing the concentration of reactants shifts the reaction in forward direction. So high concentration of H _2 shifts reaction in forward direction.
Related: Chemistry — Chemical Equilibrium · All PYQ Banks