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Calculate the half life of a first order reaction from their rate constants given below : a.200s-1 ,b.2min-1 ,c.4years-1 Select the correct answer from above options

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Correct Answer - a.3.47×10-3s b.0.35min c. 0.173years For the first order reaction ,t1/2= 0.693 k a. k=200s-1 ∴T1/2= 0.693 200s =3.465×10-3s=3.47×10-3s b.K=2min-1 t1/2= 0.693 2min =0.3465min=0.35min c.k=4year-1 t1/2= 0.693 4 =0.173years

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