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AP EAMCET202120 Aug 2021Morning ShiftChemistryd and f Block ElementsActual

Which of the following is not arranged in the correct sequence?

Options

  1. AMO , M 2 O 3 , MO 2 , M 2 O 5 - Decreasing basic nature
  2. BS c ,   V ,   C r ,   M n - Increasing number of oxidation states
  3. Cd 5 , d 3 , d 1 , d 4 - Increasing magnetic moment
  4. DMn 2 + , Fe 2 + , Cr 2 + , Co 2 + - decreasing stability

Correct answer

C. d 5 , d 3 , d 1 , d 4 - Increasing magnetic moment

Step-by-step solution

We know that as d - subshell possess five orbitals, and it can accommodate maximum 10 electrons i.e. 2 in each orbital and also magnetic moment can be given by μ = n ( n + 2 ) from the above formula we can observe that as the number of unpaired electrons increases, the magnetic moment also increases. Hence, the correct order of increasing magnetic moment will be d 5 > d 4 > d 3 > d 1

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