Question:
What is the mean life time \((\bar T)\) of a radioactive substance of which the decay constant (λ) is 4.28x10-4 per year?
What is the mean life time \((\bar T)\) of a radioactive substance of which the decay constant (λ) is 4.28x10-4 per year?
Updated On: Mar 17, 2025
- 584 years
- 1168 years
- 1619 years
- 2336 years
Hide Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
The correct option is (D):2336 years
Was this answer helpful?
0
0
Top Questions on Half life
- The bond angles H-O-N and O-N-O in the planar structure of nitric acid molecule are respectively:
- Observe the following reaction. This reaction represents: \[ 4HCl + O_2 \xrightarrow{CuCl_2, 723K} 2Cl_2 + 2H_2O \]
- A wooden plant accumulates $10 𝑚𝑔 𝑘𝑔^{−1}$ of $^{14}C$ during its life span. A fossil of this plant was discovered and contains $2.5 𝑚𝑔 𝑘𝑔^{−1}$ of $^{14}C$. The age of this fossil at the time of discovery is years (rounded off to the nearest integer).
(Use 5730 years as half-life of $^{14}C$) - Half life of a first order reaction is \(36\;hr\). Find out time (in hour) required for concentration of reactant to get reduced by \(90\%\).
The half-life of a radioactive nucleus is 5 years. The fraction of the original sample that would decay in 15 years is:
- JEE Main - 2023
- Physics
- Half life
View More Questions
Questions Asked in CUET PG exam
Match List-I with List-II and choose the correct answer:
- CUET (PG) - 2025
- Indian Philosophy and Education
Match List-I with List-II:
- CUET (PG) - 2025
- Indian Philosophy and Education
Who said this sentence –
- CUET (PG) - 2025
- Hindu Literature
Match List-I with List-II and choose the correct answer:
Match List-I with List-II and choose the correct answer:
- CUET (PG) - 2025
- Ayurvedic Texts
View More Questions