NCERT

Oxidation state of a particular element depends on the bond/ bonding process in the compound. Actinoids (5f series) have poorly shielded 5f orbitals, which can participate in bonding, while lanthanoids (4f series) have well-shielded 4f orbitals, leading to a stable +3 oxidation state. This is the re

When we move from left to right in the periodic table in Lanthanoid series ( La to Lu), a gradual decrease in atomic and ionic size of lanthanoids is experienced which is known as Lanthanoid contraction.  Lanthanoid contraction happens due to poor shielding by 4f electrons, causing stronger nuc

Students might wonder why Transition metals have variable oxidation states unlike s and p block elements, there are several reason which are mentioned below;

• Most of the d block elemets have incompletely filled d-orbitals, which allow multiple electrons to be lost in bonding process.
• The energy differ

The d and f block elements of NCERT class 12 chemistry holds significant weightage across all CBSE 10+2 level engineering and medical exams along with board exams. Students can find the weightage of d and f block elements chapter below;

• In CBSE Boards and other state board exams NCERT class 12 ch 4 c

Students can get access to the NCERT Solutions for Class 12 Chapter 8 Electromagnetic Waves in PDF by visiting the Shiksha homepage related to the Ch 8 Electromagnetic Waves and then click on the "Class 12 Alternating Current Chapter NCERT Solution PDF: Download PDF for Free," and then donwload

Yes, Students can use the NCERT Solutions for Class 12 D and F-Block Elements provided by Shiksha for every possible ways from fundamental knowledge, revision, to practice and revision of the chapter. Students can take help of Class 12 ch 4 NCERT Solution PDF prepared by our subjects experts to clea

Understanding electromagnetic waves is helpful for students who wish to score well in CBSE Board exams, and other competitive exams such as JEE Main, NEET, and NDA. It is helpful to build a strong basis for advanced topics in electromagnetism, optics, and communication technology.

Shiskha has compiled NCERT solutions for Class 12 chemistry for all the chapters as per the CBSE 2025 Syllabus. Students can access the NCERT solutions for D and F block Chemistry for NCERT Class 12 Chemistry in both ways; direct solutions on the web page or NCERT Solution PDF. Students can download

Yes IPU CET syllabus is largely based on the NCERT

• BTech: Physics, Chemistry and Mathematics from the NCERT books.
• BBA and other management courses: English, General Awareness, Logical Reasoning and Aptitude but may also require additional preparation.
• MCA: Mathematics, Logical Reasoning, and Computer