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JEE PHYSICS MCQ: NUCLEI
1
Medium
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Analyzing
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Assertion: All natural radioactive elements are ultimately converted to lead.
Reason: All the elements above lead are unstable.
Reason: All the elements above lead are unstable.
View answer and explanation
Correct option: B
Both Assertion and Reason are true and Reason is not the correct explanation of Assertion.
Option B is correct because all natural radioactive elements decay until they reach a stable element, and lead is a stable element, but not all elements above lead are unstable.
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