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Q.

For the given first order reaction 

A→B

the half life of the reaction is 0.3010 min. The ratio of the initial concentration of reactant to the concentration of reactant at time 2.0 min will be equal to ________________

(Nearest integer)

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answer is 100.

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Detailed Solution

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A→B        t1/2=0.3010 min                       A0/At  at time 2 min =? K= 2.303tlog A0At ⇒0.693t12=2.3032log A0At Or2.303×0.30100.3010=2.3032logA0At log A0At=2 ∴A0At=102=100 

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