Some Basic Concepts of Chemistry

  • Question 1
    CBSEENCH11004886

    Define the term significant figures.

    Solution

    Significant figures are meaningful digits which are known with certainty. 

    Question 2
    CBSEENCH11004887

    What is the number of significant figures in 0.0026?

    Solution

    Two

    Question 3
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    What is the number of significant figures in 9.984?

    Solution

    Four

    Question 4
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    Express the Avogadro's number (6·023×1023) upto three significant figures.

    Solution
    6·02×1023.

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