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Question
A radioactive substance emits radiations ______.
Options
α , β and γ simultaneously
in the order α , β and γ one by one
X-ray and Y-ray
α or β
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Solution
A radioactive substance emits radiations α or β.
Explanation:
In a single radioactive decay, α and β articles are never emitted simultaneously. There will be either an α- emission or a β - emission, which may be accompanied by γ emission.
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