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Nuclear Physics — Science STD 10 — Question

Tamilnadu BoardEnglish MediumSTD 10ScienceNuclear Physics1 Mark
Question
Assertion: All the radioactive element are ultimately converted in lead.
Reason: All the elements above lead are unstable.
(a) If both the assertion and the reason are true and the reason is the correct explanation of the assertion.
(b) If both the assertion and the reason are true, but the reason is not the correct explanation of the assertion.
(c) If Assertion is true, but the reason is false.
(d) If Assertion is false, but the reason is true.
(e) If the Assertion and reason both are false.
✓

Answer

(c) If Assertion is true, but the reason is false. Explanation: When they are converted into a lead, the emission is stopped because the nucleus of lead is stable (or lead is most stable elements in radioactive series)

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