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NEET Sample Paper NEET Sample Test Paper-88

  • question_answer
    Haemoglobin contains 0.334%ofiron by weight. The molecular weight of haemoglobin is approximately 67200. The number of iron atoms (at. wt. of Fe is 56) present in one molecule of haemoglobin are

    A) 1                     

    B)        6   

    C) 4         

    D)        2

    Correct Answer: C

    Solution :

    [c] Given: Percentage of the iron = 0.334%; Molecular weight of the haemoglobin = 67200 and atomic weight of the iron = 56. We know that the number of iron atoms \[\text{=}\frac{\text{Molecular}\,\,\text{w}\text{.t}\,\,\text{of}\,\,\text{haemoglobin }\!\!\times\!\!\text{  }\!\!%\!\!\text{ }\,\,\text{of}\,\,\text{iron}}{\text{100 }\!\!\times\!\!\text{ Atomic}\,\,\text{weight}\,\,\text{of}\,\,\text{iron}}\] \[=\frac{67200\times 0.334}{100\times 56}=4\]


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