AIPMT PRELIMS2006Chemistry-Chemical Kinetics
AIPMT PRELIMS 2006 Chemistry Rate Equations MCQ Question
Type: MCQ-numerical-Medium-Class 12
Consider the reaction N₂(g) + 3H₂(g) → 2NH₃(g). The equality relationship between (d[NH₃]/dt) and -(d[H₂]/dt) is:
A
(d[NH₃]/dt) = -(1/3)(d[H₂]/dt)
B
+(d[NH₃]/dt) = -(2/3)(d[H₂]/dt)
C
+(d[NH₃]/dt) = -(3/2)(d[H₂]/dt)
D
(d[NH₃]/dt) = -(d[H₂]/dt)
Correct Answer
Option B
Detailed Explanation
The stoichiometry of the reaction shows that 3 moles of H₂ produce 2 moles of NH₃. Therefore, the rate of formation of NH₃ is (2/3) times the rate of consumption of H₂.
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