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Chemical Kinetics — NEET & JEE Chemistry MCQs

30 questions written by hand against the NCERT chapter. Every wrong option is explained, not just the right one.

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Sample questions from this chapter

What does the rate of a chemical reaction measure?
  1. Change in reactant or product concentration per unit time ✓
  2. Total concentration present at equilibrium
  3. Heat released per mole regardless of time
  4. Maximum possible product yield
Answer: A. Reaction rate is the decrease of reactant concentration or increase of product concentration per unit time. Equilibrium extent is the closest related but distinct concept.
Why not B: Equilibrium concentration describes reaction extent, not how quickly composition changes.
Why not C: Reaction enthalpy is thermodynamic and does not contain a time dependence.
Why not D: Maximum yield concerns equilibrium or stoichiometry rather than speed.
For 2A → 3B, if B appears at 0.60 mol L^-1 s^-1, what is the reaction rate?
  1. 0.90 mol L^-1 s^-1 by multiplying by 3/2
  2. 0.60 mol L^-1 s^-1 without coefficient normalisation
  3. 0.20 mol L^-1 s^-1 by dividing by B's coefficient 3 ✓
  4. 0.40 mol L^-1 s^-1 by dividing by A's coefficient 2
Answer: C. Reaction rate = (1/3)d[B]/dt = 0.60/3 = 0.20 mol L−1 s−1. The 0.40 trap divides by A's coefficient instead of B's.
Why not A: Product appearance must be divided by its coefficient, not multiplied by a coefficient ratio.
Why not B: A species rate is not the normalised reaction rate when its coefficient differs from one.
Why not D: The measured species is B, so its own coefficient 3 is used.
For rate = k[A]^2[B], k = 2.0×10^-3 L2 mol^-2 s^-1, [A] = 0.10 M and [B] = 0.20 M. What is the initial rate?
  1. 4.0×10^-6 mol L^-1 s^-1 after using both A factors and one B factor ✓
  2. 4.0×10^-5 mol L^-1 s^-1 after using only one A factor
  3. 2.0×10^-4 mol L^-1 s^-1 after omitting B from the product
  4. 4.0×10^-4 mol L^-1 s^-1 from treating the law as k[A][B]
Answer: A. rate = 2.0×10−3×(0.10)²×0.20 = 4.0×10−6 mol L−1 s−1. The 4.0×10−5 trap forgets to square [A].
Why not B: This uses [A] rather than [A]², losing one factor of 0.10.
Why not C: The stated rate law requires multiplication by [B].
Why not D: This ignores the second-order dependence on A.

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Every NCERT question in this chapter is solved, free: NCERT solutions — Chemical Kinetics →

Other NEET Chemistry chapters

Some Basic Concepts of ChemistryStructure of AtomClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular StructureThermodynamicsEquilibrium

All 19 chapters →

Questions

How many NEET and JEE questions are there on Chemical Kinetics?

This chapter test has 30 questions — 10 easy, 14 medium and 6 hard — all written against the NCERT Class 12 chapter.

Is this NEET and JEE Chemistry chapter test free?

Yes. Every chapter test is free with no login, and you get your all-India rank on every one. Nothing on the site is on sale right now.

Do the questions explain the wrong options?

Yes — every distractor carries its own explanation naming the specific misconception that makes a student pick it. That is the part most question banks skip, and it is the part that changes your next attempt.