Time required for $99.9 \%$ completion of a first order reaction is _______ times the time required for completion of $90 \%$ reaction.(nearest integer)

Question

Time required for $99.9 \%$ completion of a first order reaction is _______ times the time required for completion of $90 \%$ reaction.(nearest integer),

MARKS App · Accepted Answer

​ K = t 99.9% ​ 1 ​ ln ( 0.1 100 ​ ) = t 90% ​ 1 ​ ln ( 10 100 ​ ) t 99.9% ​ = t 90% ​ ℓ n 10 ℓ n ( 1 0 3 ) ​ t 99.9% ​ = t 90% ​ × 3 ​

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