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
    CBSEENCH11004888

    What is the number of significant figures in 9.984?

    Solution

    Four

    Question 4
    CBSEENCH11004889

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

    Solution
    6·02×1023.

    NCERT Book Store

    NCERT Sample Papers

    Entrance Exams Preparation