d-and f-Block Elements
Each subtopic includes About section, revision page link, 10 preview questions, and practice CTAs.
Position in the Periodic Table
SubtopicPosition in the Periodic Table under d-and f-Block Elements for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which of the following elements belongs to the d-block but is NOT technically classified as a transition element according to the IUPAC definition?
A.Titanium ()
B.Iron ()
C.Copper ()
D.Mercury ()
- 2.
To which group do all the Lanthanoids and Actinoids (f-block elements) formally belong in the periodic table?
A.Group 1
B.Group 2
C.Group 3
D.Group 4
- 3.
The first transition series, also known as the series, is located in which period of the periodic table?
A.Period 4
B.Period 3
C.Period 5
D.Period 6
Download the worksheet for d-and f-Block Elements - Position in the Periodic Table to practice offline. It includes additional chapter-level practice questions.
Electronic Configurations and General Properties of Transition Elements
SubtopicElectronic Configurations and General Properties of Transition Elements under d-and f-Block Elements for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which of the following ions is expected to be colorless in an aqueous solution?
A.B.C.D. - 2.
Transition metals generally have high melting and boiling points. This is primarily attributed to:
A.The presence of completely filled d-orbitals
B.The involvement of electrons in addition to electrons in metallic bonding
C.Their large atomic radii and low ionization enthalpies
D.The high electronegativity of transition elements
- 3.
Which of the following elements in the 3d transition series does not exhibit variable oxidation states?
A.Iron ()
B.Scandium ()
C.Manganese ()
D.Copper ()
Download the worksheet for d-and f-Block Elements - Electronic Configurations and General Properties of Transition Elements to practice offline. It includes additional chapter-level practice questions.
Potassium Dichromate and Potassium Permanganate
SubtopicPotassium Dichromate and Potassium Permanganate under d-and f-Block Elements for Grade 12 CBSE.
Preview questions (no answers)
- 1.
In the industrial preparation of , the pyrolusite ore () is first fused with in the presence of air to form a green colored compound. This compound is:
A.B.C.D. - 2.
When is heated with concentrated and a solid chloride salt like , reddish-brown vapors are evolved. These vapors are identified as:
A.Chromyl chloride ()
B.Chromic chloride ()
C.Chlorine gas ()
D.Chromic oxide ()
- 3.
Potassium permanganate () acts as a strong oxidizing agent in acidic medium. During this reaction, the oxidation state of Manganese changes from:
A.to
B.to
C.to
D.to
Download the worksheet for d-and f-Block Elements - Potassium Dichromate and Potassium Permanganate to practice offline. It includes additional chapter-level practice questions.
The Lanthanoids
SubtopicThe Lanthanoids under d-and f-Block Elements for Grade 12 CBSE.
Preview questions (no answers)
- 1.
The steady decrease in the atomic and ionic radii of lanthanoid elements with increasing atomic number is known as lanthanoid contraction. This is primarily caused by:
A.Perfect shielding of one electron by another
B.The presence of electrons in the orbital
C.Poor shielding of nuclear charge by electrons
D.A decrease in the effective nuclear charge
- 2.
Mischmetal is an alloy widely used in the production of lighter flints. What is its approximate composition?
A.50% Iron and 50% Magnesium
B.95% Lanthanoid metal and 5% Iron
C.70% Copper and 30% Zinc
D.90% Aluminum and 10% Lanthanoid metal
- 3.
Which of the following lanthanoid elements is radioactive and does not occur naturally in the Earth's crust?
A.Cerium ()
B.Gadolinium ()
C.Promethium ()
D.Lutetium ()
Download the worksheet for d-and f-Block Elements - The Lanthanoids to practice offline. It includes additional chapter-level practice questions.
The Actinoids
SubtopicThe Actinoids under d-and f-Block Elements for Grade 12 CBSE.
Preview questions (no answers)
- 1.
Which physical property is shared by all members of the actinoid series?
A.They are all non-radioactive
B.They are all synthetic and do not occur in nature
C.They are all radioactive
D.They are all gases at room temperature
- 2.
The actinoid contraction is greater than the lanthanoid contraction from element to element. This is primarily due to:
A.The better shielding effect of electrons
B.The larger atomic radii of actinoids
C.The poorer shielding effect of electrons compared to electrons
D.The greater effective nuclear charge in lanthanoids
- 3.
Identify the element that marks the end of the actinoid series ().
A.Nobelium
B.Mendelevium
C.Lawrencium
D.Rutherfordium
Download the worksheet for d-and f-Block Elements - The Actinoids to practice offline. It includes additional chapter-level practice questions.