In a first order reaction, the concentration of the reactant decreases – McqOptions

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1.	In a first order reaction, the concentration of the reactant decreases from 0.8 M to 0.4 M in 15 minutes. The time taken for the concentration to change from 0.1 M to 0.025 M is
A.	30 min
B.	15 min
C.	7.5 min
D.	60 min
Answer» B. 15 min

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