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Kinetic study of iodide with hydrogen peroxide (starch and thiosulphate)

This type of question, asked 2 times: 28 Jul 2022, 29 Jan 2023. All 2 questions below, oldest first.

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  1. Question 1

    28 Jul 2022

    50
    For kinetic study of the reaction of iodide ion with H2O2H_{2}O_{2} at room temperature: (A) Always use freshly prepared starch solution. (B) Always keep the concentration of sodium thiosulphate solution less than that of KI solution. (C) Record the time immediately after the appearance of blue colour. (D) Record the time immediately before the appearance of blue colour. (E) Always keep the concentration of sodium thiosulphate solution more than that of KI solution. Choose the correct answer from the options given below:

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  2. Question 2

    29 Jan 2023

    125
    An indicator ' XX ' is used for studying the effect of variation in concentration of iodide: on the rate of reaction of iodide ion with H2O2H_{2}O_{2} at room temp. The indicator ' XX ' forms blue colored complex with compound ' AA ' present in the solution. The indicator ' XX ' and compound 'A' respectively are

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