After how many seconds will the concentration of the reactants in a first order reaction be halved, if the decay constant is \[\text{1}\text{.155}\times \text{1}{{\text{0}}^{\text{-3}}}{{\sec }^{-1}}\] [CBSE PMT 2000]

After how many seconds will the concentration of the reactants in a fi

1.	After how many seconds will the concentration of the reactants in a first order reaction be halved, if the decay constant is \[\text{1}\text{.155}\times \text{1}{{\text{0}}^{\text{-3}}}{{\sec }^{-1}}\] [CBSE PMT 2000]
A.	100 sec
B.	200 sec
C.	400 sec
D.	600 sec
Answer» E.

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After how many seconds will the concentration of the reactants in a first order reaction be halved, if the decay constant is \[\text{1}\text{.155}\times \text{1}{{\text{0}}^{\text{-3}}}{{\sec }^{-1}}\] [CBSE PMT 2000]

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