PYQSidePowered byPrepblink ExamsMy practice

d- and f-Block Elements

JEE Main 2024 (Online) 8th April Evening ShiftMCQEasy📈 Topic in 19% papers+4−1
Ques. 1JEE Main 2024, 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. Statement I is false but Statement II is true
  2. Statement I is true but Statement II is false
  3. Both Statement I and Statement II are false
  4. Both Statement I and Statement II are true

Answer

(4) Both Statement I and Statement II are true

Solution

Commercial preparation of KMnO4:

2MnO2 + 4KOH + O2 fuse 2K2MnO4 + 2H2O gives dark green manganate, so Statement I is true.

MnO42- electrolytic oxidation MnO4- + e- in alkaline medium gives permanganate, so Statement II is true.

Answer: (4)

Keep practising — d- and f-Block Elements

Ques. 2JEE Main 2024, 6 April (Morning Shift)

The number of elements from the following that do not belong to lanthanoids is Eu, Cm, Er, Tb, Yb and Lu

  1. 3
  2. 1
  3. 4
  4. 5
Ques. 3JEE Main 2024, 6 April (Morning Shift)

The difference in the 'spin-only' magnetic moment values of KMnO4 and the manganese product formed during titration of KMnO4 against oxalic acid in acidic medium is BM. (nearest integer)

Ques. 4JEE Main 2024, 6 April (Morning Shift)

Among CrO, Cr2O3 and CrO3, the sum of spin-only magnetic moment values of basic and amphoteric oxides is 10-2 BM (nearest integer). (Given atomic number of Cr is 24 )

Ques. 5JEE Main 2024, 6 April (Evening Shift)

Arrange the following elements in the increasing order of number of unpaired electrons in it. Choose the correct answer from the options given below :

  1. (A) < (D) < (C) < (B) < (E)
  2. (A) < (D) < (C) < (E) < (B)
  3. (B) < (C) < (D) < (E) < (A)
  4. (C) < (E) < (B) < (A) < (D)
Ques. 6JEE Main 2024, 6 April (Evening Shift)

Among VO2+, MnO4- and Cr2O72-, the spin-only magnetic moment value of the species with least oxidising ability is BM (Nearest integer). (Given atomic number V = 23, Mn = 25, Cr = 24)

Ques. 7JEE Main 2024, 5 April (Morning Shift)

The metal that shows highest and maximum number of oxidation state is :

  1. Co
  2. Mn
  3. Fe
  4. Ti
Ques. 8JEE Main 2024, 5 April (Morning Shift)

The spin-only magnetic moment value of the ion among Ti2+, V2+, Co3+ and Cr2+, that acts as strong oxidising agent in aqueous solution is BM (Near integer). (Given atomic numbers : Ti : 22, V : 23, Cr : 24, Co : 27)

Ques. 9JEE Main 2024, 5 April (Evening Shift)

The number of ions from the following that have the ability to liberate hydrogen from a dilute acid is . Ti2+, Cr2+ and V2+

  1. 1
  2. 2
  3. 3
  4. 0
Ques. 10JEE Main 2024, 5 April (Evening Shift)

The fusion of chromite ore with sodium carbonate in the presence of air leads to the formation of products A and B along with the evolution of CO2. The sum of spin-only magnetic moment values of A and B is B.M. (Nearest integer) [Given atomic number : C : 6, Na : 11, O : 8, Fe : 26, Cr : 24]

Ques. 11JEE Main 2024, 4 April (Morning Shift)

The element which shows only one oxidation state other than its elemental form is :

  1. Nickel
  2. Titanium
  3. Cobalt
  4. Scandium

All d- and f-Block Elements PYQs →

PDFDownload d- and f-Block Elements PYQs as PDF Free, with answer key and a QR code to every solution — print it or study offline⬇
All JEE Main Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolid StateSolutionsElectrochemistryChemical Kinetics
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular Structures-Block Elementsp-Block Elements (Group 13 & 14)Environmental ChemistryGeneral Principles of Isolation of Elementsp-Block Elements (Group 15–18)d- and f-Block ElementsCoordination Compounds
Organic ChemistryOrganic Chemistry – Some Basic Principles and TechniquesIsomerismHydrocarbonsHaloalkanes and HaloarenesAlcohols, Phenols and EthersAldehydes, Ketones and Carboxylic AcidsAminesBiomoleculesPrinciples Related to Practical Chemistry