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d- and f-Block Elements

JEE Main 2024 (Online) 27th January Morning ShiftMCQEasy📈 Topic in 34% papers+4−1
Ques. 1JEE Main 2024, 27 January (Morning Shift)

Which of the following electronic configuration would be associated with the highest magnetic moment?

  1. [Ar]3d7
  2. [Ar]3d8
  3. [Ar]3d3
  4. [Ar]3d6

Answer

(4) [Ar]3d6

Solution

= n(n+2) BM, n = number of unpaired electrons (Hund's rule):

[figure]

∵ 3d6 has the most unpaired electrons (4) ⇒ highest μ

Answer: (4)

Keep practising — d- and f-Block Elements

Ques. 2JEE Main 2024, 27 January (Morning Shift)

The electronic configuration for Neodymium is: [Atomic Number for Neodymium 60]

  1. [Xe]4f4 6s2
  2. [Xe]5f4 7s2
  3. [Xe]4f6 6s2
  4. [Xe]4f1 5d1 6s2
Ques. 3JEE Main 2024, 27 January (Evening Shift)

Identify the incorrect pair from the following :

  1. Haber process - Iron
  2. Polythene preparation - TiCl4, Al(CH3)3
  3. Photography - AgBr
  4. Wacker process - PtCl2
Ques. 4JEE Main 2024, 27 January (Evening Shift)

Given below are two statements : In the light of the above statements, choose the most appropriate answer from the options given below :

  1. Both Statement I and Statement II are false
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are true
  4. Statement I is false but Statement II is true
Ques. 5JEE Main 2024, 27 January (Evening Shift)

Choose the correct option having all the elements with d10 electronic configuration from the following :

  1. 46Pd, 28Ni, 26Fe, 24Cr
  2. 29Cu, 30Zn, 48Cd, 47Ag
  3. 27Co, 28Ni, 26Fe, 24Cr
  4. 28Ni, 24Cr, 26Fe, 29Cu

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