Class 12 Chemistry NCERT Exemplar Solutions: Chapter 8, The d and f-Block Elements

Now, solving the NCERT Exemplar problems becomes quite easy with the help of the solutions provided at jagranjosh.com/cbse, as these solutions will help you get a better approach to the right explanation for each NCERT Exemplar question.  

In this article we are providing the NCERT Exemplar solutions for Class 12 Chemistry chapter - The d and f-Block Elements. All the questions have been solved in the most appropriate and simple way so as to help students access the right study material for the exam preparation.

All the class 12 Chemistry NCERT Exemplar solutions have been collated in PDF format which students may easily download totally free. 

NCERT Exemplar solutions are available in the form of PDF which students can download for free of cost and refer the same when required.

CBSE Class 12 Chemistry Syllabus 2018 – 2019

Few problems along with their solutions from this chapter are given below:

Q. The electronic configuration of Cu (II) is 3d⁹ where as that of Cu(I) is 3d¹⁰. Which of the following is correct?

(a) Cu(II) is more stable

(b) Cu(II) is less stable

(c) Cu(II) and Cu(II) are equally stable

(d) Stability of Cu(I) and Cu(II) depends on nature of copper salts

Ans. (a) Cu(II) is more stable      

Cu (II) is more stable than Cu (I). As it is known that, Cu (I) has 3d¹⁰ stable configuration while Cu (II) has 3d⁹ configuration. But Cu (II) is more stable due to greater effective nuclear, i.e., it hold 17 electrons instead of 18 in Cu (I).

Q. Transition elements show high melting points. Why?

Ans. Transition elements show high melting points, due to the involvement of greater number of electrons in the interatomic bonding from (n-1) d-orbitals in addition to ns electrons in forming metallic bond.

Q.The halides of transition elements become more covalent with increasing oxidation state of the metal. Why?

Ans. As the oxidation state increases, size of the ion of transition element decreases. As per Fajan's rule, as the size of metal ion decreases, covalent character of the bond formed increases.

Therefore, the halides of transition elements become more covalent with increasing oxidation state of the metal.

Find below the links to download Class 12 Chemistry NCERT Exemplar Solutions for chapter 8- The d and f-Block Elements:

Class 12 Chemistry NCERT Exemplar Problems: The d and f-Block Elements

NCERT Exemplar problems are a very good resource for preparing the critical questions like Higher Order Thinking Skill (HOTS) questions. Every year, many questions from the NCERT Exemplar are directly asked in the board exams. Also, these are the kind of questions asked in the various competitive exams and Olympiad level tests. So, it’s very important for students to practice the NCERT exemplar problems to prepare well for the boards and the competitive exams.

Here, we are providing the NCERT Exemplar Problems for Class 12 Chemistry chapter – The d and f-Block Elements, in the PDF form which students may download and solve them to analyse their preparedness for the exams.

Class 12 Chemistry NCERT Solutions: All Chapters

Important topics discussed in Class 12 Chemistry chapter – The d and f-Block Elements, are:

• Position in the Periodic Table
• Electronic Configurations of the d-Block Elements
• General Properties of the Transition Elements (d-Block)
• Some Important Compounds of Transition Elements
• The Lanthanoids
• The Actinoids
• Some Applications of d- and f-Block Elements. 

Download the complete NCERT Exemplar problems from the following link:

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