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NEET Chemistry Analytical Chemistry Question Bank Self Evaluation Test - Analytical Chemistry

  • question_answer
    3.92 g of ferrous ammonium sulphate react N completely with \[50ml\frac{N}{10}KMn{{O}_{4}}\] solution. The percentage purity of the sample is

    A) 50                    

    B) 78.4  

    C) 80                                

    D) 39.2

    Correct Answer: A

    Solution :

    [a] Eq of \[KMn{{O}_{4}}\] used \[=\frac{50\times 1}{1000\times 10}=0.005\] \[\therefore \] Eq of FAS reacted = 0.005 \[\therefore \] weight of FAS needed \[=0.005\times 392=1.96g\]


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