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NCERT Exemplar Class 11 Chemistry Chapter 3 Solutions: Classification of Elements and Periodicity in Properties

NCERT Exemplar Solutions for Class 11 Chemistry Chapter 3 illustrates the historical development of the Periodic Table. Studying the chapter, you will learn about Modern Periodic Law and how the periodic classification occurs. The main topics of the chapter of NCERT Exemplar Class 11 Chemistry include the genesis of periodic classification, nomenclature of elements with atomic numbers greater than 100, periodic trends in properties of elements, electronic configurations of elements and the periodic table.

This chapter of the NCERT Exemplar Class 11 Chemistry book consists of 6 exercises with a total of 55 exemplar problems. Solving these NCERT Exemplar Problems for Class 11 Chemistry will help you in clearing your concepts on the classification of elements and periodicity in properties. Also, these solutions are based on the NCERT book topics so there is no fear of missing out on the official syllabus released by CBSE.

In case of any doubts in these exemplar problems, you will not have to rush anywhere else as we have provided you with the best answers. Our subject matter experts have done thorough research on the topics to create these answers for you. Read them once and solve all your queries quickly.

Important Topics for NCERT Chemistry Exemplar Solutions Class 11 Chapter 3 – Classification of Elements and Periodicity in Properties

Modern Periodic Law

The modern periodic law defines the physical and chemical properties of the elements that are considered as the periodic functions of their atomic numbers. Scientists decided elements in increasing order of their atomic numbers from left to right across each row.

Noble Gases

Some of the noble gases include helium, argon, krypton, neon, xenon, and radon. These gases are known as noble gases because they are so majestic that they don’t react with anything. For this reason, they are also called inert gases.

Ionization Enthalpy

Ionization Enthalpy of elements is the total volume of energy that an inaccessible gaseous atom needs to lose an electron in its ground state. Losing of electrons results in the creation of cations. The first ionization energy of element A is the energy necessary by an atom to form A+ ions.

Electron Gain Enthalpy

Electron gain enthalpy is considered as the total volume of energy released when an electron is added to an inaccessible gaseous atom. When an electron is added, energy can either be released or absorbed.

Anomalous Properties of Second Period Elements

Some of the anomalous properties of second-period elements are listed below:

  • They are small in size
  • These atoms are high electronegativity
  • They have a large charge/ radius ratio.
  • These elements also consist of only 4 valence orbitals available (2s and 2p) for bonding as compared to the 9 available (3s, 3p, and 3d) to the other members of the particular groups, so their maximum covalence is 4.

Exercise-wise Discussion of NCERT Chemistry Exemplar Solutions Class 11 Chapter 3 – Classification of Elements and Periodicity in Properties

Exercise 3.1 – Multiple Choice Questions I

The first exercise of the chapter has around 13 exemplar problems which are multiple-choice questions. These problems are based on the classification of elements and periodicity in properties.

Exercise 3.2 – Multiple Choice Questions II

This exercise has around 10 exemplar problems which are completely related to the main topics of this chapter including the genesis of periodic classification, nomenclature of elements with atomic numbers > 100, periodic trends in properties of elements, electronic configurations of elements and the periodic table.

Exercise 3.3 –Short Answer Types Questions

Exercise 3.3 has around 19 short answer type exemplar problems. Practice well to make your concepts stronger.

Exercise 3.4 – Match the following

This exercise set has a total of 3 questions in which there are questions based on high order thinking skills. If you face issues in solving the questions, you can refer to NCERT Exemplar Chemistry Solutions for Chapter 3 by Instasolv.

Exercise 3.5 – Assertion and Reason Type

This exercise set has a total of 3 questions in which you need to choose the right answer from the options given.

Exercise 3.6 – Long Answer Type Questions

This exercise set has a total of 7 exemplar problems in which you need to give a proper explanation of the situation mentioned. 

Why Use NCERT Chemistry Exemplar Solutions Class 11 Chapter 3 – Classification of Elements and Periodicity in Properties by Instasolv?

  • NCERT Exemplar Class 11 Chemistry Chapter 3 is prepared by the Chemistry teachers, who have made answers on Classification of Elements and Periodicity in Properties comparatively easy for you.
  • Referring to these solutions spontaneously increases your attention on the significant topics as there is no distraction of a crowded tuition class.
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