A radioactive element forms its own isotope after 3 consecutive disintegrations. The particle emiited are
Options
(a) 3 β-particles (b) 2 β-particles and 1 α-particle (c) 2 β-particles and 1 γ-particle (d) 2 […]
Given a sample of radium-226 having half-life of 4 days. Find the probability, a nucleus disintegrates after 2 half-lives.
Options
(a) 1 (b) (1/2) (c) 1.5 (d) (3/4)
Correct Answer:
(3/4)
Explanation:
No […]
If 20% of a radiactive element decays in 10 days, then amount of original material left after 30 days is (approx)
Options
(a) 78% (b) 62% (c) 51% (d) 48%
Correct Answer:
51%
During mean life of a radioactive element, the fraction that disintegrates is
Options
(a) e (b) 1/e (c) (e-1)/e (d) e/(e-1)
Correct Answer:
(e-1)/e
Explanation:
No explanation available. Be the first to write […]
What is the amount of energy released by deuterium and tritium fusion?
Options
(a) 60.6 eV (b) 12.6 eV (c) 17.6 eV (d) 28.3 eV
Correct Answer:
17.6 eV
Explanation:
No explanation available. […]
If ₉₂U²³⁸ undergoes successively 8 ∝-decays and 6 β-decays, the resulting nucleus is
Options
(a) ₉₂U²⁰⁸ (b) ₉₂Pb²⁰⁶ (c) ₉₂U²¹⁰ (d) ₉₂U²¹⁴
Correct Answer:
₉₂Pb²⁰⁶
Explanation:
No explanation available. Be the first to […]
The energy released in the fission of 1 kg of ₉₂U²³⁵ is (energy per fission = 200 MeV)
Options
(a) 5.1 x 10²⁶ eV (b) 5.1 x 10²⁶ J (c) 8.2 x 10¹³ […]
If 75% of the radioactive reaction is completed in 2 hrs, what would be the half life period?
Options
(a) 1 hour (b) 1.5 hour (c) 2 hour (d) 3 hour
Correct Answer: […]
When a radioactive substance emits an ∝ particle, its position in the periodic table is lowered by
Options
(a) one place (b) two places (c) three places (d) four places
Correct Answer:
two […]
Three fourth of the active material decays in a radioactive sample in 3/4 sec. The half life of the sample is
Options
(a) 1/2 sec (b) 1 sec (c) 3/8 sec (d) 3/4 […]
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