Block D and F Elements

8.1 The elements which have partially filled d or f subshells in any common oxidation state are called as the transition elements. Silver (the Atomic number is 47 and electronic configuration is [Kr] 4d¹⁰5s¹) has a completely filled 4d orbital in its ground state but has two oxidation states (+1, +2).

In the +1 oxidation state, an electron is removed from the s-orbital and in +2 oxidation state, one electron from d-orbital is also removed. Thus, the d-orbital now becomes partially filed (4d⁹). Hence, it is a transition element.

Students can refer the NCERT Solutions for Class 12 Chemistry Chapter 4 The d and f block Elements shared by the experts at Shiksha for NCERT Chemisytry textbook questions. The solutions for CBSE Chemistry d and f block questions is explanined in easy way for better understanding.

Students need to practice the Class 12 Chemistry previous year question to identify the important questions. Some of important questions are reactions of $K_2Cr_2O_7$K2? Cr2? O7? and $KMnO_4$KMnO4? in acidic, basic, and neutral medium, lanthanide contraction and its consequences, balancing redox reactions, etc.

Students can use the class 12 previous year d and f block questions pdf to prepare for the exam and self-assessment. NCERT solutions enhace the proble sloving skills by explaning the complex questions in easy way.