NEET Chemistry: Chemical Kinetics — MCQ Test 16

Q6. A reaction has the rate law \( \text{Rate} = k[\text{A}][\text{B}]^{1/2} \). What is the unit of the rate constant?

Q7. A first-order reaction has a rate constant of \( 0.0462 \, \text{min}^{-1} \). What percentage of the reactant remains after 15 minutes?

Q8. A reaction has the rate law \( \text{Rate} = k[\text{A}]^{1/2}[\text{B}]^{3/2} \). What is the overall order?

Q9. A second-order reaction has a rate constant of \( 0.1 \, \text{L mol}^{-1} \text{min}^{-1} \). If the initial concentration is \( 0.2 \, \text{mol L}^{-1} \), what is the time for 50% completion?

Q10. A zero-order reaction has a rate constant of \( 3.0 \times 10^{-3} \, \text{mol L}^{-1} \text{s}^{-1} \). If the initial concentration is \( 0.09 \, \text{mol L}^{-1} \), how long will it take for 66.67% decomposition?

NEET Chemistry — Chemical Kinetics

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A first-order reaction is 30% complete in 15 minutes. What is the rate constant?

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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, Complete, Constant, Concentration, Completion, and Quadrupled.

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 is 30% complete in 15 minutes. What is the rate constant?

  • A. 0.0154 min\(^{-1}\)
  • B. 0.0238 min\(^{-1}\)
  • C. 0.0346 min\(^{-1}\)
  • D. 0.0462 min\(^{-1}\)

Q2. A second-order reaction has a rate constant of \( 0.06 \, \text{L mol}^{-1} \text{min}^{-1} \) and an initial concentration of \( 0.3 \, \text{mol L}^{-1} \). What is the time for 66.67% completion?

  • A. 100 min
  • B. 125 min
  • C. 75 min
  • D. 111.17 min

Q3. A reaction has the rate law \( \text{Rate} = k[\text{A}]^{1/2}[\text{B}] \). If the concentration of A is quadrupled and B is halved, what happens to the rate?

  • A. Doubles
  • B. Remains same
  • C. Increases by 4 times
  • D. Decreases to half

Q4. A reaction’s rate increases by 2.83 times when the temperature rises from 300 K to 310 K. What is the activation energy (\( R = 8.314 \, \text{J mol}^{-1} \text{K}^{-1} \))?

  • A. 40.2 kJ mol\(^{-1}\)
  • B. 60.2 kJ mol\(^{-1}\)
  • C. 80.3 kJ mol\(^{-1}\)
  • D. 100.4 kJ mol\(^{-1}\)

Q5. A first-order reaction has a half-life of 20 minutes. What fraction of the reactant remains after 60 minutes?

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

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