Q28.A radioactive substance decays to ( 161 )th of its initial activity in 80 days. The half life of the radioactive substance expressed in days is ________.
What This Question Tests
This question tests the understanding of radioactive decay and half-life, requiring the calculation of half-life from the reduction in activity over a given time.
Concepts Tested
Formulas Used
A = A₀ (1/2)^(t/T_half)
📚 NCERT Sections This Tests
3.17 — During Nuclear Explosion, One Of The Products Is 90Sr With Half-Life Of
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.
13.4 — Obtain Approximately The Ratio Of The Nuclear Radii Of The Gold Isotope
Physics Class 12 · Chapter 13
13.4 Obtain approximately the ratio of the nuclear radii of the gold isotope 197 79 Au and the silver isotope 10747 Ag .
3.25 — Sucrose Decomposes In Acid Solution Into Glucose And Fructose According
Chemistry Class 11 · Chapter 3
3.25 Sucrose decomposes in acid solution into glucose and fructose according to the first order rate law, with t1/2 = 3.00 hours. What fraction of sample of sucrose remains after 8 hours ?
📋 Question Details
- Chapter
- Nuclei
- Topic
- Radioactivity and Half-life
- Year
- 2021
- Shift
- 20 Jul Shift 2
- Q Number
- Q28
- Type
- Numerical
- NCERT Ref
- Class 12 Physics Ch 13: Nuclei
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