CBSE 12th

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 difference between (n-1)d and ns orbitals is small, so both d and s orbital electrons can participate in bonding.
• They form stable ionic and covalent bonds, adjusting oxidation states according to ligand or reaction conditions.

Students can check more such questions and answers in our NCERT Solution pages, for all NCERT Tesxtbooks.

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 clear doubts and revise properly. Students can practice with NCERT solutions of D and F block elements to improve problem-solving skills, and better preparation for exams like JEE, CUET UG  and NEET. Students can access Class 12 NCERT Ch 4 d and f block elements solutions below;

NCERT Solutions for d and f block elements 

Here are some o the points for candidates to focus on while preparing for the Class 12 Physics Ch 8 Electromagnetic Waves:

• Focus on understanding Maxwell's equations.
• Understand the role of displacement current.
• Comprehend the practical applications of electromagnetic waves.
• Solve numerical problems and refer to NCERT Solutions for Class 12 Physics PDF for the detailed explanations. 

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.

The Class 12 Physics Chapter 8 Electromagnetic waves consists of some of the important topics that can be asked in the CBSE Board exams and other competitive exams. Therefore, it is necessary for candidates to follow up with these important topics such as Electromagnetic waves properties, Maxwell's equations, displacement current, and the electromagnetic spectrum. These waves are used for real-world applications like communication systems, medical imaging, and remote sensing.

I'm sorry but I didn't understand your question. I'm intrepating that you are saying you scored 67.7 in 12th and you are asking for eligibility in JEE Mains exam, so the eligibility criteria for JEE is 75% percent for general category and 65 % for ST/SC. If you belongs to the reserved category then you are eligible. 

Yes, there is a clash between JEE Main Session 2 and CBSE Class 12 board exams, specifically for language papers on April 2nd, Home Science on April 3rd, and Psychology on April 4th, potentially affecting students who are appearing for both exams.