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Railways General Science & Technology General Concepts of Chemistry Sample Paper General Concepts of Chemistry Sample Test Paper-22

  • question_answer
    The percentage of oxygen in \[NaOH\] is

    A)  40                   

    B)  60

    C)  8                    

    D)  10

    Correct Answer: A

    Solution :

    [a] \[\because \] 40 gm. \[NaOH\] contains 16 gm. of oxygen. \[\therefore \] 100 gm. of \[NaOH\] contains \[=\frac{16}{40}\,\,\,100=40%\] Oxygen


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