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d- and f-Block Elements

JEE Main 2024 (Online) 29th January Evening ShiftMCQEasy📈 Topic in 8% papers+4−1
Ques. 1JEE Main 2024, 29 January (Evening Shift)

Which of the following statements are correct about Zn, Cd and Hg? Choose the most appropriate from the options given below:

  1. C, D only
  2. B, C only
  3. A, D only
  4. B, D only

Answer

(4) B, D only

Solution

Zn, Cd, Hg: (n-1)d10ns2 — no unpaired d electrons.

A: no unpaired d electrons ⇒ weak metallic bonding ⇒ LOWEST enthalpy of atomisation in their series ⇒ A is false

B: Zn, Cd show only +2; Hg shows +1 ( Hg22+) and +2 ⇒ B is true

C: M2+ is d10 ⇒ diamagnetic ⇒ C is false

D: weak metallic bonding ⇒ soft, low-melting (Hg is a liquid) ⇒ D is true

∴ B, D only

Answer: (4)

Keep practising — d- and f-Block Elements

Ques. 2JEE 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
Ques. 3JEE 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. 4JEE 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. 5JEE 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. 6JEE 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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