A first order reaction with respect to the reactant A has a rate constant of \[6\ {{\sec }^{-1}}\]. If we start with [A] = 0.5 mol/litre, then in what time the concentration of A becomes 0.05 mol/litre [DCE 2004]

A first order reaction with respect to the reactant A has a rate const

1.	A first order reaction with respect to the reactant A has a rate constant of \[6\ {{\sec }^{-1}}\]. If we start with [A] = 0.5 mol/litre, then in what time the concentration of A becomes 0.05 mol/litre [DCE 2004]
A.	0.384 sec
B.	0.214 sec
C.	3.84 sec
D.	0.402 sec
Answer» B. 0.214 sec

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A first order reaction with respect to the reactant A has a rate constant of \[6\ {{\sec }^{-1}}\]. If we start with [A] = 0.5 mol/litre, then in what time the concentration of A becomes 0.05 mol/litre [DCE 2004]

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