AIIMS2014Chemistry-Chemical Equilibrium
AIIMS 2014 Chemistry Chemical Equilibrium MCQ Question
Type: MCQ-conceptual-Medium-Class 11
For the gas phase reaction, C2H4 + H2 ⇌ C2H6; [ΔH = -32.7 kcal] Carried out in a vessel, the equilibrium concentration of C2H4 can be increased by
A
decreasing the pressure
B
increasing the temperature
C
removing some C2H6
D
adding some H2
Correct Answer
Option B
Detailed Explanation
The correct answer is B) increasing the temperature because the reaction is exothermic (ΔH = -32.7 kcal), meaning that heat is released when C2H4 reacts with H2 to form C2H6. According to Le Chatelier's principle, increasing the temperature will shift the equilibrium position to favor the endothermic direction, which is the reverse reaction that produces more C2H4, thus increasing its concentration.
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