MCQ (Previous Year Questions) - Chemical Kinetics (Level 2) - JEE MCQ

Consider the chemical reaction, N₂(g) + 3H₂(g) → 2NH₃(g). The rate of this reaction can be expressed in term of time derivative of concentration of N₂(g), H₂(g) or NH₃(g). Identify the correct relationship amongst the rate expressions.           [JEE SCR 2002]

In a first order reaction the concentration of reactant decreases from 800 mol/dm³ to 50 mol/dm³ in 2
× 10⁴ sec. The rate constant of reaction in sec^–1 is :           [JEE SCR 2003]

The reaction, X → Product follows first order kinetics. In 40 minutes the concentration of X changes from 0.1 M to 0.025 M. Then the rate of reaction when concentration of X is 0.01 M           [JEE SCR 2004]

Which of the following statement is incorrect about order of reaction ?           [JEE 2005]

Consider a reaction aG + bH → Products. When concentration of both the reactants G and H is doubled, the rate increases by eight times. However, when concentration of G is doubled keeping the concentration of H fixed, the rate is doubled. The overall order of the reaction is           [JEE 2006]

Under the same reaction conditions, initial concentration of 1.386 mol dm^–3 of a substance becomes
half in 40 seconds and 20 seconds through first order and zero order kinetics, respectively.

Ratio  of the rate constants for first order (k₁) and zero order (k₀) of the reactions is [JEE 2008]

For a first order reaction A → P, the temperature (T) dependent rate constant (k) was found to follow the equation log k = – (2000) 1/T + 6.0. The pre-exponential factor A and the activation energy E_a, respectively, are           [JEE 2009]

For the first order reaction
2N₂O₅(g) → 4NO₂(g) + O₂(g)           [JEE 2011]