Atomos Test Generator Free PYQs ExamsMy practice Log in / Sign up free

d- and f-Block Elements

AIPMT 2006MCQEasy📈 Topic in 50% papers+4−1
Ques. 1AIPMT 2006

In which of the following pairs are both the ions coloured in aqueous solution? (At. no. : Sc = 21, Ti = 22, Ni = 28, Cu = 29, Co = 27)

  1. Ni2+, Cu+
  2. Ni2+, Ti3+
  3. Sc3+, Ti3+
  4. Sc3+, Co2+.

Answer

(2) Ni2+, Ti3+

Solution

As per NCERT, transition metal ions with incompletely filled d orbitals are coloured because of d–d transitions; ions with d0 or d10 configuration are colourless.

Sc3+: 3d0 ⇒ colourless

Ti3+: 3d1 ⇒ coloured

Co2+: 3d7 ⇒ coloured

Ni2+: 3d8 ⇒ coloured

Cu+: 3d10 ⇒ colourless

∴ Both ions are coloured only in the pair Ni2+, Ti3+.

Answer: (2)

Keep practising — d- and f-Block Elements

Ques. 2AIPMT 2006

Copper sulphate dissolves in excess of KCN to give

  1. Cu(CN)2
  2. CuCN
  3. [Cu(CN)4]3-
  4. [Cu(CN)4]2-
Ques. 3AIPMT 2006

More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

  1. more active nature of the actinoids
  2. more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
  3. lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
  4. greater metallic character of the lanthanoids than that of the corresponding actinoids.
Ques. 4AIPMT 2005

More number of oxidation states are exhibited by the actinoids than by the lanthanoids. The main reason for this is

  1. more active nature of the actinoids
  2. more energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
  3. lesser energy difference between 5f and 6d orbitals than that between 4f and 5d orbitals
  4. greater metallic character of the lanthanoids than that of the corresponding actinoids.
Ques. 5AIPMT 2005

The number of moles of KMnO4 reduced by one mole of KI in alkaline medium is

  1. one
  2. two
  3. five
  4. one fifth
Ques. 6AIPMT 2005

Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

  1. Vanadium (Z = 23)
  2. Chromium (Z = 24)
  3. Manganese (Z = 25)
  4. Iron (Z = 26)
Ques. 7AIPMT 2005

The aqueous solution containing which one of the following ions will be colourless? (Atomic number : Sc = 21, Fe = 26, Ti = 22, Mn = 25)

  1. Sc3+
  2. Fe2+
  3. Ti3+
  4. Mn2+
Ques. 8AIPMT 2004

Among K, Ca, Fe and Zn, the element which can form more than one binary compound with chlorine is

  1. Fe
  2. Zn
  3. K
  4. Ca
Ques. 9AIPMT 2004

Among the following series of transition metal ions, the one where all metal ions have 3d2 electronic configuration is [At. Nos. Ti = 22, V = 23, Cr = 24, Mn = 25]

  1. Ti3+, V2+, Cr3+, Mn4+
  2. Ti+, V4+, Cr6+, Mn7+
  3. Ti4+, V3+, Cr2+, Mn3+
  4. Ti2+, V3+, Cr4+, Mn5+
Ques. 10AIPMT 2004

Lanthanoids are

  1. 14 elements in the sixth period (atomic no. 90 to 103) that are filling 4f sublevel
  2. 14 elements in the seventh period (atomic number = 90 to 103) that are filling 5f sublevel
  3. 14 elements in the sixth period (atomic number = 58 to 71) that are filling the 4f sublevel
  4. 14 elements in the seventh period (atomic number = 50 to 71) that are filling 4f sublevel.
Ques. 11AIPMT 2003

Which one of the following characteristics of the transition metals is associated with their catalytic activity?

  1. High enthalpy of atomization
  2. Paramagnetic behaviour
  3. Colour of hydrated ions
  4. Variable oxidation states

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 NEET Chemistry chapters
Physical ChemistrySome Basic Concepts of ChemistryStructure of AtomStates of MatterThermodynamicsEquilibriumRedox ReactionsSolid StateSolutionsElectrochemistryChemical KineticsSurface Chemistry
Inorganic ChemistryClassification of Elements and Periodicity in PropertiesChemical Bonding and Molecular StructureHydrogens-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 AcidsAminesBiomoleculesPolymersChemistry in Everyday LifePrinciples Related to Practical Chemistry