JEE Chemistry
Order & Molecularity: JEE Questions & Solutions
8 previous-year JEE Chemistry questions on Order & Molecularity, each with a worked step-by-step solution.
Previous-year questions
- 01Which of the following graphs most appropriately represents a zero-order reaction?MCQEasyJEE 2025
- 02Consider an elementary reaction: A(g) + B(g) → C(g) + D(g) If the volume of the reaction mixture is suddenly reduced to 1/3 of its initial…MCQEasyJEE 2025
- 03The reaction A₂ + B₂ → 2AB follows the mechanism: A₂ → k₁ A + A (fast) A + B₂ → k₂ AB + B (slow) A + B → AB (fast) The overall order of the…MCQMediumJEE 2025
- 04A person's wound was exposed to some bacteria and then bacteria growth started to happen at the same place. The wound was later treated…MCQMediumJEE 2025
- 05A student has studied the decomposition of a gas AB₃ at 25^° C. He obtained the following data. p (mm Hg) 50, 100, 200, 400 Relative…MCQEasyJEE 2023
- 06For a certain chemical reaction X → Y, the rate of formation of the product is plotted against time. The plot rises linearly in region I,…NVAMediumJEE 2023
- 07For conversion of compound A → B, the rate constant of the reaction was found to be 4.6 × 10⁻⁵ L mol⁻¹ s⁻¹. The order of the reaction isNVAEasyJEE 2023
- 08The reaction 2NO + Br₂ → 2NOBr takes place through the mechanism given below: NO + Br₂ ↔ NOBr₂ (fast) NOBr₂ + NO → 2NOBr (slow) The overall…NVAMediumJEE 2023
Frequently asked questions
Our bank has 8 previous-year JEE Chemistry questions tagged to Order & Molecularity, drawn from JEE papers between 2023 and 2025, including 4 from 2025 alone. Each comes with a full step-by-step solution.
Order & Molecularity is rated Intermediate overall for JEE Chemistry. The PYQs on this page break down as 4 easy, 4 medium.
Of the 8 previous-year questions on Order & Molecularity, 5 are multiple-choice (MCQ) and 3 are numerical-value (NVA) questions.
Based on recent paper analysis, Order & Molecularity is worth about 1 mark in JEE Main. It sits in Chemical Kinetics, a Class 12 Chemistry chapter.
More Chemical Kinetics topics
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