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प्रश्न
A first order reaction takes 40 min for 75% decomposition. Calculate rate constant.
[Given: log 2 = 0.30, log 4 = 0.60]
संख्यात्मक
उत्तर
According to the first-order reaction
`t = 2.303/k log 10/(100 - x)`
`k = 2.303/(40 min) log 100/(100 - 75)`
`k = 2.303/(40 min) log 100/25`
`k = 2.303/(40 min) log4`
`k = 2.303/(40 min) xx 0.60`
k = 0.0345 min−1
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