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Question

A first order reaction has a half life period of 69.3sec. At 0.10mollit1 reactant concentration rate will be:

A
104Msec1
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B
103Msec1
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C
101Msec1
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D
6.93×101Msec1
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Solution

The correct option is B 103Msec1
As we know,
t1/2=69.3 seck=0.69369.3=102sec1

Now, r=k[A]=102×0.1=103Msec1

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