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JEE Main & Advanced Chemistry Some Basic Concepts of Chemistry / रसायन की कुछ मूलभूत अवधारणाएँ Question Bank Chemical stoichiometry

  • question_answer
    Haemoglobin contains 0.33% of iron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (At. wt. of Fe = 56) present in one molecule of haemoglobin is                            [CBSE PMT 1998]

    A)                 6             

    B)                 1

    C)                 4             

    D)                 2

    Correct Answer: C

    Solution :

               \[\because \]   100gm Hb contain = 0.33gm Fe                    \[\therefore \]   67200gm Hb ­= \[\frac{67200\times 0.33}{100}gm\ Fe\]                                 gm atom of Fe =\[\frac{672\times 0.33}{56}=4\].


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