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Uncertainty in an experimental value is indicated by mentioning the number of:
ASequential factors
BSecondary features
CSelected fractions
DSignificant figures
Answer & Solution
Correct answer: D. Significant figures
1. Precision has to be communicated with the number itself.
2. How many digits are written is the signal.
3. The uncertainty in experimental or calculated values is indicated by the number of significant figures.
4. So the answer is significant figures.
_Source: NCERT Class XI Chemistry Part I, Unit 1 'Some Basic Concepts of Chemistry'_
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