AIIMS2007ChemistryChemical Kinetics
Decay constant of a radioactive substance is (69.3 ~sec ⁻¹ ), find (t_ 1 / 16 ) of the same substance.
Options
- A(4 10⁻² ~sec )
- B(2 10⁻² ~sec )
- C(1 10⁻² ~sec )
- DNone of these
Correct answer
A. (4 10⁻² ~sec )
Step-by-step solution
(1 t_ 1 / 2 1 2 t_ 1 / 2 1 4 t_ 1 / 2 1 8 t_ 1 / 2 1 16 ) So, (t_ 1 / 16 =4 t_ 1 / 2 ) (=4 0.693 =4 0.693 69.3 =4 10⁻² sec . )