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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Percentage composition and Molecular formula

  • question_answer
    The percentage of nitrogen in urea is about      [KCET 2001]

    A)                 46          

    B)                 85

    C)                 18          

    D)                 28

    Correct Answer: A

    Solution :

               Urea- \[N{{H}_{2}}-CO-N{{H}_{2}}\]                    \[\because \]   60gm of urea contains 28gm of nitrogen                                 \[\therefore \]   100gm of urea contains \[\frac{28}{60}\times 100=46.66\].


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