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NEET AIPMT SOLVED PAPER 2000

  • question_answer
                    Of the following transition metals, the maximum numbers of oxidation states are exhibited by:

    A)                                                                                                                                                                                         chromium (Z = 24)          

    B)                 manganese (Z = 25)

    C)                 iron (Z = 26)       

    D)                 titanium (Z = 22)

    Correct Answer: B

    Solution :

                    Manganese shows maximum number of oxidation states because it has S unpaired electrons in 3d and also contains 2 electrons in 4s-subshell.                 + 2, + 3, + 4, + 5, + 6, + 7                 Other metals show the following oxidation states                 Cr = + 2, + 3, + 4, + 5, + 6                 Fe = + 2, + 3                 Ti = +2, + 3, + 4


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