TOPIC : CHEMICAL KINETICS
Number of questions are 163 Select_Question:

QUESTION
Q1) Half life of radium is 1580 years. Its average life will be..[ AFMC 1999]




SOLUTION

t 1/2 = 0.693 / λ
∴ = 0.693 / 1580
Average life = 1 / λ = 1580 /0.693 = 2.275× 103 yrs
Answer: (c)