Question

For kinetic study of the reaction of iodide ion with $H _2 O _2$ 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 :

• A. (A), (B), (C) only
• B. (A), (D), (E) only
• C. (D), (E) only
• D. (A), (B), (E) only

Answer 1

Answer: (A)

(A), (B), (C) only

Answer 2

The correct option is (A): (A), (B), (C) only