Chemical Kinetics and Nuclear ChemistryHard

Question

The time for half life period of a certain reaction A → products is 1 hour. When the initial concentration of the reactant ′A′, is 2.0 mol L-1, how much time does it take for its concentration to come from 0.50 to 0.25 mol L-1 if it is a zero order reaction ?

Options

A.4 h
B.0.5 h
C.0.25 h
D.1 h

Solution

For a zero order reaction k =                   →(1)
Where x = amount decomposed
k = zero order rate constant
for a zero order reaction
                                                      →(2)
Since [A0] = 2M. t1/2 = 1 hr ; k = 1
∴ from equation (1)
= 0.25 hr

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