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Order of a reaction from the units of its rate constant

This type of question, asked 5 times: 20 Apr 2025 S1, 25 Apr 2025 S1, 13 Apr 2026 S1, 13 Apr 2026 S2, 13 May 2026 S2. All 5 questions below, oldest first.

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  1. Question 1

    20 Apr 2025 S1

    85
    The rate constant for the reaction, 2 N2O5(g)→2 N2O4(g)+O2(g)2{\text{ }N}_{2}O_{5(g)}\rightarrow 2{\text{ }N}_{2}O_{4(g)}+O_{2(g)} is .98×10−4 s−1.98 \times10^{- 4}{\text{ }s}^{- 1}. What is the order of reaction?

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  2. Question 2

    25 Apr 2025 S1

    74
    For a reaction A→A \rightarrow Product, rate constant is 6.93×10−36.93 \times10^{- 3} hour  −1\ ^{- 1}. What is order of reaction?

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  3. Question 3

    13 Apr 2026 S1

    28
    Identify a type of order of reaction that its unit of rate constant is mol dm−3s−1\mathrm{dm^{-3}s^{-1}} from the following.

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  4. Question 4

    13 Apr 2026 S2

    29
    The rate constant of a reaction is k=3.28×10−4 s−1k = 3.28 \times 10^{-4}\ \mathrm{s^{-1}}. Find the order of the reaction.

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  5. Question 5

    13 May 2026 S2

    31
    For a reaction A→A \rightarrow Product, the rate constant is 6.09×10−3 hour−16.09 \times 10^{-3}\ \mathrm{hour^{-1}}. What is the order of the reaction?

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