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Time in a zero-order reaction from its half-life

This type of question, asked 2 times: 1 Feb 2023, 4 Apr 2025. All 2 questions below, oldest first.

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  1. Question 1

    1 Feb 2023

    148
    A→BA \rightarrow B The above reaction is of zero order. Half-life of this reaction is 50 min⁡50\text{ }\min. The time taken for the concentration of A to reduce to one-fourth of its initial value is ____\_\_\_\_ min. (Nearest integer)

  2. Question 2

    4 Apr 2025

    120
    Half life of zero order reaction A→A \rightarrow product is 1 hour, when initial concentration of reaction is 2.0 mol L−12.0\text{ }mol{\text{ }L}^{- 1}. The time required to decrease concentration of A from 0.50 to 0.25 mol L−10.25\text{ }mol{\text{ }L}^{- 1} is:

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