Question

# Under the same reaction conditions, the initial concentration of 1.386 mol dm−3 of a substance becomes half in 40 seconds and 20 seconds through first order and zero order kinetics, respectively. The ratio (k1/k0) of the rate constants for first order (k1) and zero order (k0)of the reaction is

A
0.5
B
1.0
C
1.5
D
2.0

Solution

## The correct option is A 0.5For the first order reaction,the rate constant k1=0.693t1/2=0.69340 For zero order reaction, the rate constant k0=A02×t1/2=1.3862×20 Hence, k1k0=0.6931.386=0.5Chemistry

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