alleryAll radioactive decays follow which order of kinetics?
AVariable order
BFirst order
CSecond order
DZero order
Answer & Solution
Correct answer: B. First order
**Natural and artificial radioactive decays of unstable nuclei are first-order**.
Half-life is constant, independent of the amount of radioactive substance — this is why carbon-dating works.
Keep practising Unit 5A1: Reaction Rates and Rate Laws
Browse all Unit 5A1: Reaction Rates and Rate Laws questions for NEET UG, or explore more Chemistry topics.
Related questions
Time required to decompose SO₂Cl₂ to half of its initial amount is 60 min. Assuming first-For a zero-order reaction, if the initial concentration is doubled, the half-life:For a first-order reaction, if the initial concentration of N₂O₅ is 1.24 × 10⁻² mol L⁻¹ anFor a first-order reaction, the time required for 99.9% completion is approximately:In the Arrhenius equation, the pre-exponential factor A is also called:On a plot of ln k versus 1/T (Arrhenius plot), what is the slope?The Arrhenius equation is:For a chemical reaction, with a rise in temperature by 10°C, the rate of reaction typicall