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

  • question_answer
    The empirical formula of a compound is \[C{{H}_{2}}O.\] 0.0835 moles of the compound contains 1.0 g of hydrogen. Molecular formula of the compound is

    A)                 \[{{C}_{2}}{{H}_{12}}{{O}_{6}}\]              

    B)                 \[{{C}_{5}}{{H}_{10}}{{O}_{5}}\]

    C)                 \[{{C}_{4}}{{H}_{8}}{{O}_{8}}\] 

    D)                 \[{{C}_{3}}{{H}_{6}}{{O}_{3}}\]

    Correct Answer: A

    Solution :

               \[\because \] 0.0835 mole of compound contains 1gm of hydrogen                    \[\therefore \] 1gm mole of compound contain = \[\frac{1}{0.0835}=11.97\]                     =12gm of hydrogen.                                 12 gm of \[{{H}_{2}}\] is present in \[{{C}_{2}}{{H}_{12}}{{O}_{6}}\]


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