MHT CET Chemistry Question (2026) — Solution

Step-by-step solution

From the unit of the rate constant ( s ^ -1 ), we can determine that the given reaction is a first-order reaction. For a first-order reaction, the rate law is expressed as: Rate = k[ N _2 O _5] Given values are: Rate = 2.4 10^ -5 mole L ^ -1 s ^ -1 k = 3.0 10^ -5 s ^ -1 Substituting these values into the rate equation: 2.4 10^ -5 = 3.0 10^ -5 [ N _2 O _5] Solving for the concentration of N _2 O _5: [ N _2 O _5] = 2.4 10^ -5 3.0 10^ -5 [ N _2 O _5] = 2.4 3.0 [ N _2 O _5] = 0.8 mol L ^ -1 Answer: 0.8