NEET Questions Solved


In a first order reaction, the concentration of the reactant is decreased from 1.0 M to 0.25M in 20 minute. The rate constant of the reaction would be:

(a) 10min-1

(b) 6.931 min-1

(c) 0.6931 min-1

(d) 0.06931 min-1

(d) 

t=2.303Kloga(a-x)   K=2.30320log10.25=0.06931min-1

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