NEET Chemistry: Chemical Kinetics — MCQ Test 20

Q6. A first-order reaction is 40% complete in 15 minutes. What is the rate constant?

Q7. A first-order reaction is 20% complete in 12 minutes. What is the rate constant?

Q8. A zero-order reaction has a rate constant of \( 2.0 \times 10^{-3} \, \text{mol L}^{-1} \text{s}^{-1} \). How long will it take for the concentration to decrease from \( 0.12 \, \text{mol L}^{-1} \) to \( 0.03 \, \text{mol L}^{-1} \)?

Q9. A first-order reaction has a half-life of 24 minutes. What percentage of the reactant remains after 72 minutes?

Q10. For the reaction \( \text{A} + 3\text{B} \to 2\text{C} \), the rate of disappearance of A is \( 0.02 \, \text{mol L}^{-1} \text{min}^{-1} \). What is the rate of formation of C?

NEET Chemistry — Chemical Kinetics

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A reaction’s rate increases by 2.25 times when the temperature rises from 300 K to 310 K. What is the activation energy (\( R = 8.314 \, \text{J mol}^{-1} \text{K}^{-1} \))?

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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, Increases, Temperature, Activation, Constant, and Concentration.

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 reaction’s rate increases by 2.25 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. 31.4 kJ mol\(^{-1}\)
  • B. 47.1 kJ mol\(^{-1}\)
  • C. 78.4 kJ mol\(^{-1}\)
  • D. 62.7 kJ mol\(^{-1}\)

Q2. The rate constant of a reaction is \( 3.0 \times 10^{-3} \, \text{s}^{-1} \) at 27°C. If the activation energy is 55 kJ/mol, what is the rate constant at 37°C (\( R = 8.314 \, \text{J mol}^{-1} \text{K}^{-1} \))?

  • A. 4.5 \(\times\) 10\(^{-3}\) s\(^{-1}\)
  • B. 6.12 \(\times\) 10\(^{-3}\) s\(^{-1}\)
  • C. 7.5 \(\times\) 10\(^{-3}\) s\(^{-1}\)
  • D. 9.0 \(\times\) 10\(^{-3}\) s\(^{-1}\)

Q3. A second-order reaction has an initial concentration of \( 0.3 \, \text{mol L}^{-1} \) and a half-life of 20 s. What is the rate constant?

  • A. 0.1 L mol\(^{-1}\) s\(^{-1}\)
  • B. 0.2 L mol\(^{-1}\) s\(^{-1}\)
  • C. 0.25 L mol\(^{-1}\) s\(^{-1}\)
  • D. 0.1667 L mol\(^{-1}\) s\(^{-1}\)

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

  • A. 1
  • B. 2
  • C. 3
  • D. 4

Q5. A first-order reaction is 25% complete in 15 minutes. What is the rate constant?

  • A. 0.0154 min\(^{-1}\)
  • B. 0.0192 min\(^{-1}\)
  • C. 0.0231 min\(^{-1}\)
  • D. 0.0306 min\(^{-1}\)

+ 5 more questions in the actual test

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