The reaction \( A \longrightarrow B \) follows first order kinetics. The time taken for \( 0.8 \...

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The reaction \( A \longrightarrow B \) follows first order kinetics. The time taken for \( 0.8 \) mole of \( A \) to produce \( 0.6 \) mole of \( B \) is 1 hour. What is the time taken for conversion of
\( \mathrm{P} \) \( 0.9 \) mole of \( A \) to produce \( 0.675 \) mole of \( B \) ?
(a) 1 hour
(b) \( 0.5 \) hour
(c) \( 0.25 \) hour
(d) 2 hours
(2003)
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