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Question

The number of significant figures in $6.02 \times 10^{23}$ is :
3
23
4
26

A

23

B

26

C

3

D

4

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Solution

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When numbers are written in scientific notation, then the number of digits between 1 and 10 gives the number of significant figures.

Thus, the number $6.02 \times 10^{23}$ contains 3 significant figures.

All the three digits ( $6, 0$ and $2$ ) are significant.

Hence, option B is correct.

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