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  • Need clarity, kindly explain! - Some basic concepts in chemistry - JEE Main-2

How many significant digits does  3.09\times 10^{1} have?

  • Option 1)

    4

  • Option 2)

    3

  • Option 3)

    7

  • Option 4)

    5

 

Answers (1)

best_answer

As we learnt in 

Rules for significant figures -

In numbers written in scientific notation, all digits are significant e.g., 6.0 x 102  has two significant figures, and 8.656 × 10–3 has four significant figures.

-

 

In numbers written in scientific notation, all digits are significant. So, in , 3.09\times 10^{1}we have 4 significant digits.

 


Option 1)

4

Incorrect

Option 2)

3

Correct

Option 3)

7

Incorrect

Option 4)

5

Incorrect

Posted by

prateek

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