NEET Chemistry: Chemical Kinetics — MCQ Test 14

Q6. A reaction’s rate constant doubles when the temperature increases from 20°C to 30°C. What is the activation energy (\( R = 8.314 \, \text{J mol}^{-1} \text{K}^{-1} \))?

Q7. A zero-order reaction takes 120 s to reduce the concentration from \( 0.06 \, \text{mol L}^{-1} \) to \( 0.03 \, \text{mol L}^{-1} \). What is the rate constant?

Q8. A first-order reaction has a rate constant of \( 0.0139 \, \text{min}^{-1} \). What is the half-life?

Q9. A reaction has the rate law \( \text{Rate} = k[\text{A}][\text{B}] \). If the concentration of A is tripled and B is reduced to one-third, what happens to the rate?

Q10. A second-order reaction has a rate constant of \( 0.02 \, \text{L mol}^{-1} \text{min}^{-1} \) and an initial concentration of \( 0.4 \, \text{mol L}^{-1} \). What is the half-life?

NEET Chemistry — Chemical Kinetics

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A first-order reaction has a half-life of 35 minutes. What fraction of the reactant remains after 105 minutes?

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About this NEET MCQ Test

This page provides a free online MCQ test for NEET Chemistry preparation, focusing specifically on the chapter Chemical Kinetics. It contains 10 carefully selected multiple-choice questions (MCQs) designed to test your conceptual understanding and exam readiness.

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Key concepts covered in this specific test include Reaction, Fraction, Reactant, Constant, Required, and Completion.

Taking these timed MCQ tests helps you simulate the real NEET exam environment. Detailed step-by-step explanations are provided for every question to help you learn from your mistakes and strengthen your fundamentals.

Preview of Questions in this Test

Q1. A first-order reaction has a half-life of 35 minutes. What fraction of the reactant remains after 105 minutes?

  • A. 1/4
  • B. 1/2
  • C. 1/16
  • D. 1/8

Q2. A first-order reaction has a rate constant of \( 0.0462 \, \text{min}^{-1} \). What is the time required for 75% completion?

  • A. 15 min
  • B. 20 min
  • C. 30 min
  • D. 40 min

Q3. For the reaction \( 2\text{A} \to \text{B} + \text{C} \), the rate of formation of C is \( 0.05 \, \text{mol L}^{-1} \text{s}^{-1} \). What is the rate of disappearance of A?

  • A. 0.025 mol L\(^{-1}\) s\(^{-1}\)
  • B. 0.1 mol L\(^{-1}\) s\(^{-1}\)
  • C. 0.05 mol L\(^{-1}\) s\(^{-1}\)
  • D. 0.2 mol L\(^{-1}\) s\(^{-1}\)

Q4. The molecularity of the elementary step \( \text{H}_2 + 2\text{ICl} \to 2\text{HCl} + \text{I}_2 \) is:

  • A. 1
  • B. 3
  • C. 2
  • D. 4

Q5. A first-order reaction has a half-life of 18 minutes. What percentage of the reactant remains after 54 minutes?

  • A. 25%
  • B. 50%
  • C. 12.5%
  • D. 6.25%

+ 5 more questions in the actual test

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