Chemical Kinetics Question 320

Question: For a first order reaction A→B the reaction rate at reactant concentration of 0.01 M is found to be 2.0×10−5molL−1s−1 . The half-life period of the reaction is

Options:

A) 30 s

B) 220 s

C) 300 s

D) 347 s

Show Answer

Answer:

Correct Answer: D

Solution:

[d] Given [A]=0.01M Rate =2.0×10−5molL−1s−1 For a first order reaction Rate =k[A]

k=2.0×10−5[0.01]=2×10−3

t1/2=0.6932×10−3=347sec

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