A reaction which is of first order w.r.t. reactant A, has a rate constant 6 min−1 . If we start with [A]=0.5 mol L−1 , when would [A] reach the value of 0.05 mol L−1

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0.384 min

0.15 min

3 min

3.84 min

answer is A.

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Detailed Solution

t=2.303klogaa−x=2.3036log0.50.05=0.384 min

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