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d- and f-Block Elements

JEE Main 2026 (Online) 4th April Morning ShiftMCQMedium📈 Topic in 2% papers+4−1
Ques. 1JEE 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

Answer

(3) B and D Only

Solution

A. Down a group of the d-block the higher oxidation states become more stable; as per NCERT, Mo(VI) and W(VI) are more stable than Cr(VI) ( Cr2O72- is a strong oxidant, MoO3, WO3 are not) ⇒ A is incorrect.

B. Ce4+ and Tb4+ tend to return to the common +3 state ⇒ oxidants; Eu2+ and Yb2+ also go to +3 ⇒ reductants ⇒ B is correct.

C. Am: [Rn]5f7 7s2 ⇒ 7 unpaired electrons; Cm: [Rn]5f7 6d1 7s2 ⇒ 8 unpaired electrons ⇒ C is incorrect.

D. Because 5f electrons shield very poorly, the actinoid contraction from element to element is greater than the lanthanoid contraction ⇒ D is correct.

∴ B and D only

Answer: (3)

Keep practising — d- and f-Block Elements

Ques. 2JEE 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. 3JEE 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. 4JEE 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
Ques. 5JEE Main 2026, 4 April (Evening Shift)

Consider |x| is the difference in oxidation states of Mn in highest manganese fluoride and highest manganese oxide. The ions with |x| number of unpaired electrons from the following are : Choose the correct answer from the options given below :

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

Which of the following sets includes all the species that will change the orange colour of K2Cr2O7 in acidic medium ?

  1. Fe2+, Sn2+, I-, S2-
  2. S2-, Fe3+, I-, C2O42-
  3. Fe2+, NO2-, SO2, Sn4+
  4. Fe3+, SO42-, S2-, Sn4+
Ques. 7JEE Main 2026, 2 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 true
  2. Both Statement I and Statement II are false
  3. Statement I is true but Statement II is false
  4. Statement I is false but Statement II is true
Ques. 8JEE Main 2026, 2 April (Evening Shift)

Among Fe2+, Fe3+, Cr2+ and Zn2+, the ion that shows positive borax bead test and with highest ionisation enthalpy is :

  1. Fe2+
  2. Zn2+
  3. Cr2+
  4. Fe3+
Ques. 9JEE Main 2026, 2 April (Evening Shift)

Number of paramagnetic ions among the following d- and f-block metal ions is . Mn2+, Cu2+, Zn2+, Yb2+, Sc3+, La3+, Gd3+, Lu3+, Ti4+, Ce4+ (Atomic number of Mn = 25, Cu = 29, Zn = 30, Yb = 70, Sc = 21, La = 57, Gd = 64, Lu = 71, Ti = 22, Ce = 58)

Ques. 10JEE Main 2026, 28 January (Morning Shift)

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

  1. Statement I is false but Statement II is true
  2. Both Statement I and Statement II are false
  3. Both Statement I and Statement II are true
  4. Statement I is true but Statement II is false
Ques. 11JEE Main 2026, 28 January (Evening Shift)

Consider the following statements about manganate and permanganate ions. Identify the correct statements. Choose the correct answer from the options given below :

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

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