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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.
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:
Link to Download Solutions
Multiple Choice Questions (Type-I)
Multiple Choice Questions (Type-II)
Short Answer Type Questions
Matching Columns Type Questions
Assertion and Reason Type Questions
Long answer types questions
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.
Important topics discussed in Class 12 Chemistry chapter – The d and f-Block Elements, are:
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