Question

A radioactive substance emits radiations :

• A. in the order α , β and γ one by one
• B. α or β
• C. X-rays and γ rays
• D. α , β and γ simultaneously

Answer 1

The correct option is B α or β

In a single radioactive decay, α and β particles are never emitted simultaneously. There will be either an α-emission or a β-emission, which may be accompanied by γ emission.
Correct answer: (d) α or β