A) Zero
B) One
C) Two
D) Three
Correct Answer: B
Solution :
For an \[{{n}^{th}}\] order reaction, \[{{t}_{1/2}}\propto \frac{1}{{{C}^{n-1}}}\] (C = initial cone.) Hence, for 1st order reaction (n = 1), we have \[{{t}_{1/2}}\propto \frac{1}{{{C}^{1-1}}}\] \[\therefore \] \[{{t}_{1/2}}\propto {{C}^{0}}\] Thus half-life of 1st order reaction is independent of the initial concentration of reactant.
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