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Grade: 12

                        

Which of the following statements is/are false? THIS QUESTION HAS MULTIPLE CORRECT OPTIONS A) A fast reaction has a large rate constant and short half-life B) Half life depends on concentration of reactants for first order reaction. C) For a first order reaction, the half-life is independent of concentration D) The half-life of a reaction is half the time required for the reaction to go to completion

2 months ago

Answers : (2)

Vikas TU
13786 Points
							
Dear student 
For the first-order reaction, the half-life period is independent of the concentration of the reactants 
t half life = 0.693/K 
Hence, option B is false and option C is true.
Half-life is when half of the concentration is reacted not the half the time required for the reaction to go to completion.
Hence, the answers are B and D
2 months ago
Vikas Amritiya
askIITians Faculty
158 Points
							

The rate of a fast reaction is high. Hence, a fast reaction has a large rate-constant and short half-life. Thus option A is true.

For the first-order reaction, the half-life period is independent of the concentration of the reactants. t1/2
=

.0.693/k 
Hence, option B is false and option C is true.
Half-life is when half of the concentration is reacted not the half the time required for the reaction to go to completion.
 
Hence, the answers are B and D
2 months ago
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