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 :
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) 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 :
Updated On: Apr 19, 2026
- (A), (B), (C) only
- (A), (D), (E) only
- (D), (E) only
- (A), (B), (E) only
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The Correct Option is A
Solution and Explanation
The correct option is (A): (A), (B), (C) only
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Concepts Used:
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Factors Affecting The Reaction Rate:
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- Surface Area of Reactants - When two or more reactants are in the same phase of fluid, their particles collide more often than when either or both are in the solid phase or when they are in a heterogeneous mixture. In a heterogeneous medium, the collision between the particles occurs at an interface between phases. Compared to the homogeneous case, the number of collisions between reactants per unit time is significantly reduced, and so is the reaction rate.
- Temperature - If the temperature is increased, the number of collisions between reactant molecules per second. Increases, thereby increasing the rate of the reaction.
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- Catalyst - Catalysts alter the rate of the reaction by changing the reaction mechanism.