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The respective number of significant figures for the numbers 23.023, 0.0003 and 2.1 \(\times\) 10–3 are

  1. ) 5, 1, 2
  2. ) 5, 1, 5
  3. ) 5, 5, 2
  4. ) 4, 4, 2
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Corret option is 1) 5,1,2

23.023 has 5 significant figures.

0.0003 has 1 significant figure.

2.1 \(\times\)10–3 has 2 significant figures.

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