NEET Chemistry Chemical Kinetics Questions Solved


A reactant with initial concentration 1.386 mol litre-1 showing first order change takes 40 minute to become half. If it shows zero order change taking 20 minute to becomes half under the similar conditions, the ratio, K1/K0 for first order and zero order kinetics will be:

(a) 0.5 mol-1 litre

(b) 1.0 mol/litre

(c) 1.5 mol/litre

(d) 2.0 mol-1 litre

 

(a) For I order : (t1/t2)1 = 0.693/K1

For zero order : (t1/2)0 = a/2K0

K1/K0 x 1.386/2x0.693 = (t1/2)0/(t1/2)1

K1/K0 =(20x2x0.693) / 40x1.386 = 0.5mol-1litre

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