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A(g) to 2B(g) + C(g), total pressure at time t and after completion: rate constant

The same question, asked 2 times: 9 Apr 2024*, 7 Apr 2025. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    9 Apr 2024

    145
    Consider the following first order gas phase reaction at constant temperature
    A(g)→2 B( g)+C(g)A(g) \rightarrow 2\text{ }B(\text{ }g) + C(g)
    If the total pressure of the gases is found to be 200 torr after 23sec23sec. and 300 torr upon the complete decomposition of A after a very long time, then the rate constant of the given reaction is ____ ×10−2 s−1\times10^{- 2}{\text{ }s}^{- 1} (nearest integer) [Given: log⁡102=0.301\log_{10}2 = 0.301 ]

  2. Question 2

    7 Apr 2025

    28
    Reaction A(g)→2 B( g)+C(g)A(g) \rightarrow 2\text{ }B(\text{ }g) + C(g) is a first order reaction. It was started with pure A
    t/minPressure of system at time t/mm Hg
    10160
    ∞\infty
    		240
    Which of the following option is incorrect ?

    Tap an option to check your answer.