Physics Nuclear Physics MDCAT 2013
PMDC Verified Question 82 of 98
Emission of radiation from radioactive substance is
A
Dependent on both temperature and pressure
B
Independent of both temperature and pressure
C
Independent of temperature but dependent on pressure
D
Independent of pressure but dependent on temperature
Tap any option to test your recall and reveal the step-by-step Propolis autopsy.

Propolis Cognitive Error Autopsy

Official Correct Choice:
Option B: Independent of both temperature and pressure


Concept:

Radioactivity is fundamentally a purely nuclear phenomenon, governed by the weak and strong nuclear forces operating deep inside the nucleus.

Solution:

  • Macroscopic physical conditions such as temperature, pressure, chemical bonding, and electric/magnetic fields only affect the outer electron shells of an atom.


  • The energy scales of chemical changes (eV) are millions of times weaker than nuclear changes (MeV). Therefore, external environmental factors are completely unable to influence the probability or rate of nuclear decay.


Why other options are incorrect:

Any option asserting that radioactive decay depends on external thermodynamic factors like temperature or pressure is physically incorrect.

Quality & Fidelity Assurance: Every question on BeambePrep is rigorously curated against the official PMDC syllabus with zero filler, zero out-of-syllabus content, and zero typos. When an authentic past paper originally contained a historical mistake or ambiguity from the examining board (such as UHS or NUMS), BeambePrep faithfully reflects the original paper while detailing the nuance and scientific consensus in the autopsy above.

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