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For a first order reaction \( A \longrightarrow B \) the reaction rate
P at reactant concentration of \( 0.01 \mathrm{M} \) is found to be \( 2.0 \times 10^{-5} \mathrm{~mol} \mathrm{~L}^{-1} \mathrm{~s}^{-1} \). The half-life period of the
W reaction is
(a) \( 30 \mathrm{~s} \)
(b) \( 220 \mathrm{~s} \)
(c) \( 300 \mathrm{~s} \)
(d) \( 347 \mathrm{~s} \)
(2005)
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