NEET ChemistryNCERT Class 12Chemical Kinetics

Chemical Kinetics: NEET questions with solutions

NEET tests rate expressions and stoichiometric factors, order and molecularity, units of k, rate laws from initial-rate data, integrated equations and half-lives for zero and first order, the Arrhenius equation and the role of a catalyst. Marks are lost by confusing order with molecularity, by using the first-order half-life for a zero-order reaction, and by dropping 2.303 or mixing J with kJ in Arrhenius calculations.

Revise first: NCERT notes for Chemical Kinetics

Questions

10 questions · answers after you pick

1Which statement about the molecularity of a reaction is correct?Molecularity of a reactionEasySingle correct 2For 2N₂O₅(g) → 4NO₂(g) + O₂(g), N₂O₅ is consumed at 0.020 mol L⁻¹ s⁻¹ at a certain moment. At what rate is NO₂ being formed at that moment?Rate of a chemical reactionEasySingle correct 3The rate law of a reaction is rate = k[A][B], with concentrations in mol L⁻¹ and time in seconds. What are the units of k?Order of a reactionEasySingle correct 4A reaction is zero order in its only reactant, with k = 0.010 mol L⁻¹ s⁻¹. If the initial concentration is 0.50 mol L⁻¹, what is its…Zero order reactionsMediumSingle correct 5For A + B → products, initial rates were measured at 298 K:Rate law and rate constantMediumSingle correct 6Match each type of reaction in List I with an example of it in List II.Order of a reaction and pseudo first orderMediumMatch the following 7A catalyst is added to a reversible reaction at constant temperature. Which of the statements below are correct?Effect of catalystMediumStatement based 8Most reactions speed up noticeably when they are warmed. Judge the Assertion (A) and the Reason (R) below.Temperature dependence of rateMediumAssertion–Reason 9The rate constant of a reaction triples when the temperature is raised from 300 K to 320 K. What is its activation energy? (R = 8.314 J K⁻¹…Arrhenius equationHardSingle correct 10A first-order reaction is 20% complete in 10 minutes. What is its half-life? (log 1.25 = 0.0969)Integrated rate equation: first orderHardSingle correct

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