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d- and f-Block Elements

JEE Main 2024 (Online) 27th January Evening ShiftMCQEasy📈 Topic in 5% papers+4−1
Ques. 1JEE 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

Answer

(2) 29Cu, 30Zn, 48Cd, 47Ag

Solution

(A): Pd is 4d10, but Ni 3d8, Fe 3d6, Cr 3d5 ⇒ (A) is wrong

(B): Cu [Ar]3d104s1, Zn [Ar]3d104s2, Cd [Kr]4d105s2, Ag [Kr]4d105s1 ⇒ all d10 ⇒ (B) is correct

(C): Co 3d7, Ni, Fe, Cr ⇒ (C) is wrong

(D): Ni, Cr, Fe ⇒ (D) is wrong

∵ in Cu and Ag a completely filled d subshell ( d10s1) is more stable than d9s2

Answer: (2)

Keep practising — d- and f-Block Elements

Ques. 2JEE Main 2026, 8 April (Evening Shift)

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

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 3JEE Main 2026, 8 April (Evening Shift)

Given below are two statements for catalytic properties of transition metals. In the light of the above statements, choose the correct answer from the options given below :

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 4JEE Main 2026, 6 April (Morning Shift)

The correct statements among the following are : Choose the correct answer from the options given below :

  1. A and B Only
  2. A, C and D Only
  3. C and D Only
  4. B, C and D Only
Ques. 5JEE Main 2026, 6 April (Evening Shift)

The correct order of first ( iH1) and second ( iH2) ionisation enthalpy values of Cr and Mn are : Choose the correct answer from the options given below :

  1. A and B only
  2. B and C only
  3. A and D only
  4. C and D only
Ques. 6JEE Main 2026, 5 April (Morning Shift)

Which of the following is NOT a physical or chemical characteristics of interstitial compounds?

  1. They have high melting points, higher than those of pure metals.
  2. They are very soft and ionic in nature.
  3. They retain metallic conductivity.
  4. They are chemically inert and usually non-stoichiometric.
Ques. 7JEE Main 2026, 5 April (Evening Shift)

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

  1. Both Statement I and Statement II are correct
  2. Both Statement I and Statement II are incorrect
  3. Statement I is correct but Statement II is incorrect
  4. Statement I is incorrect but Statement II is correct
Ques. 8JEE Main 2026, 4 April (Morning Shift)

The correct statements among the following are, Choose the correct answer from the options given below :

  1. A and B Only
  2. C and D Only
  3. B and D Only
  4. A and C Only
Ques. 9JEE Main 2026, 4 April (Morning Shift)

Correct statements from the following are Choose the correct answer from the options given below :

  1. A, B and C Only
  2. A, C and D Only
  3. A and C Only
  4. B and D Only
Ques. 10JEE Main 2026, 4 April (Morning Shift)

Match the LIST-I with LIST-II Choose the correct answer from the options given below :

  1. A-I, B-III, C-IV, D-II
  2. A-II, B-I, C-III, D-IV
  3. A-IV, B-II, C-I, D-III
  4. A-III, B-I, C-IV, D-II
Ques. 11JEE Main 2026, 4 April (Evening Shift)

Pairs of elements with the same number of electrons in their respective 4f orbital are [Atomic number. Eu-63, Gd-64, Dy-66, Ho-67, Tm-69, Yb-70, Lu-71, Hf-72] Choose the correct answer from the options given below :

  1. B and C Only
  2. A and B Only
  3. A and D Only
  4. A and C Only

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