JEE Main 2022 Chemistry question
For kinetic study of the reaction of iodide ion with 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 colou (e) Always keep the concentration of sodium thiosulphate solution more than that of KI solution. Choose the correct answer from the options given below :
Solution
To minimise contamination, a freshly prepared starch solution is used to determine the end point (a). KI is used in excess to consume all the , so the concentration of
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