Chemical Kinetics

CBSE Class 12 · Chemistry · 39 past questions

27 of 39 · show all

1. Q1 2026

   Identify the correct statement…

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2. Q2 2026

   The order for the given reaction is…

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3. Q3 2026

   For question number 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled…

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4. Q4 2026

   The concentration of the reactant is reduced from 0.6 mol L$^{-1}$ to 0.2 mol L$^{-1}$ in 5 minutes in a…

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5. Q5 2026

   Which of the following curve represents the first order reaction ? (with a figure)

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6. Q6 2026

   Which of the following represents the fraction of molecules with energies equal to or greater than E$_a$ ?

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7. Q9 2026

   For a reaction $3A \rightarrow 2B$, the rate of reaction $\dfrac{+d[B]}{dt}$ is equal to…

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8. Q10 2026

   For Questions number 13 to 16, two statements are given — one labelled as Assertion (A) and the other…

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9. Q11 2026

   For a reaction A + B $\to$ Products, the rate law is…

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10. Q13 2025

    Reactant 'A' underwent a decomposition reaction. The concentration of 'A' was measured periodically and…

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11. Q14 2025

    Which among the following is a false statement ?

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12. Q15 2025

    The number of molecules that react with each other in an elementary reaction is a measure of the…

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13. Q16 2025

    For question number 13 to 16, two statements are given – one labelled as Assertion (A) and the other labelled…

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14. Q17 2025

    The rate constant for a zero order reaction A $\to$ P is 0.0030 mol L$^{-1}$s$^{-1}$. How long will it take…

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15. Q19 2024

    The addition of catalyst during a chemical reaction alters which of the following quantities of the reaction ?

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16. Q20 2024

    For the elementary reaction P → Q, the rate of disappearance of 'P' increases by a factor of 8 upon doubling…

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17. Q21 2024

    A first order reaction has a rate constant 1.25 × 10⁻³ s⁻¹. How long will 5 g of this reactant take to reduce…

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18. Q23 2024

    When a catalyst increases the rate of a chemical reaction, then the rate constant (k)…

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19. Q24 2024

    For Questions number 13 to 16, two statements are given — one labelled as Assertion (A) and the other…

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20. Q26 2024

    For the reaction X + 2Y → P, the differential form equation of the rate law is…

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21. Q27 2024

    In the Arrhenius equation, when log k is plotted against 1/T, a straight line is obtained whose…

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22. Q29 2023

    The slope in the plot of $\ln$[R] vs. time for a first order reaction is

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23. Q30 2023

    For the reaction 3A → 2B, rate of reaction $+\frac{d[B]}{dt}$ is equal to

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24. Q32 2023

    The unit of the rate of reaction is the same as that of the rate constant for a…

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25. Q33 2023

    For Questions number 15 to 18, two statements are given — one labelled as Assertion (A) and the other…

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26. Q36 2023

    Which of the following is affected by catalyst ?

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27. Q38 2022

    Define rate of reaction. Write two factors that affect the rate of reaction.

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