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Q.

The half-life of a first order reaction is
 

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a

Independent of the initial concentration of the reactant
 

b

Directly proportional to the initial concentration of the reactant
 

c

Inversely proportional to the initial concentration of the reactant
 

d

Directly proportional to the square of the initial concentration of the reactant.

answer is A.

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Detailed Solution

For 1st  order reaction half life is independent of initial concentration.
t1/2=0.693k

Therefore, the correct option is (A).

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