allerySignificant figures are digits known with certainty plus one that is:
AElaborated
BEnumerated
CEstimated
DEliminated
Answer & Solution
Correct answer: C. Estimated
1. A measurement is never infinitely precise.
2. The last digit recorded carries the doubt.
3. Significant figures are meaningful digits known with certainty plus one which is estimated or uncertain.
4. So the answer is estimated.
_Source: syllabus Chemistry Part I, Unit 1 'Some Basic Concepts of Chemistry'_
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