Q18.A radioactive nucleus can decay by two different processes. Half-life for the first process is 3. 0 hours while it is 4. 5 hours for the second process. The effective halflife of the nucleus will be (1) 3. 75 hours (2) 0. 56 hours (3) 0. 26 hours (4) 1. 80 hours
What This Question Tests
This question involves calculating the effective half-life of a radioactive nucleus that decays via two independent processes with different half-lives.
Concepts Tested
Formulas Used
λ = ln(2)/T_½
λ_eff = λ₁ + λ₂
T_½_eff = ln(2)/λ_eff
📚 NCERT Sections This Tests
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Chemistry Class 11 · Chapter 3
3.17 During nuclear explosion, one of the products is 90Sr with half-life of 28.1 years. If 1mg of 90Sr was absorbed in the bones of a newly born baby instead of calcium, how much of it will remain after 10 years and 60 years if it is not lost metabolically.
13.2 — Obtain The Binding Energy Of The Nuclei 5626Fe And 20983 Bi In Units Of
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13.2 Obtain the binding energy of the nuclei 5626Fe and 20983 Bi in units of MeV from the following data: m ( 5626Fe ) = 55.934939 u m ( 20983 Bi ) = 208.980388 u
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3.18 For a first order reaction, show that time required for 99% completion is twice the time required for the completion of 90% of reaction.
📋 Question Details
- Chapter
- Nuclei
- Topic
- Radioactive decay & effective half-life
- Year
- 2022
- Shift
- 26 Jun Shift 2
- Q Number
- Q18
- Type
- MCQ
- NCERT Ref
- Class 12 Physics Ch 13: Nuclei
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