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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
    A compound (80 g) on analysis gave C = 24 g, H = 4 g,   O = 32 g. Its empirical formula is                    [CPMT 1981]

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

    B)                 \[{{C}_{2}}{{H}_{2}}O\]

    C)                 \[C{{H}_{2}}{{O}_{2}}\] 

    D)                 \[C{{H}_{2}}O\]

    Correct Answer: D

    Solution :

               \[C=24gm\], \[H=4gm\], \[O=32gm\]                    So, Molecular formula \[={{C}_{2}}{{H}_{4}}{{O}_{2}}\]                    So, Empirical formula \[=C{{H}_{2}}O\]                                 (Simplest formula).


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