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Questions  >>  JEEMAIN and NEET  >>  NEET PAST PAPERS  >>  2007
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Q)

If 60% of a first order reaction was completed in 60 minutes, 50% of the same reaction would be completed in approximately : ($\log 4 = 0.60, \log 5 = 0.69$)


( A ) 40 minutes
( B ) 50 minutes
( C ) 45 minutes
( D ) 60 minutes

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