CBSE Class 11 Chemistry Periodic Classification Worksheet

Access the latest CBSE Class 11 Chemistry Periodic Classification Worksheet. We have provided free printable Class 11 Chemistry worksheets in PDF format, specifically designed for Chapter 3 Classification of Elements and Periodicity in Properties. These practice sets are prepared by expert teachers following the 2025-26 syllabus and exam patterns issued by CBSE, NCERT, and KVS.

Chapter 3 Classification of Elements and Periodicity in Properties Chemistry Practice Worksheet for Class 11

Students should use these Class 11 Chemistry chapter-wise worksheets for daily practice to improve their conceptual understanding. This detailed test papers include important questions and solutions for Chapter 3 Classification of Elements and Periodicity in Properties, to help you prepare for school tests and final examination. Regular practice of these Class 11 Chemistry questions will help improve your problem-solving speed and exam accuracy for the 2026 session.

Download Class 11 Chemistry Chapter 3 Classification of Elements and Periodicity in Properties Worksheet PDF

CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES
 
I. Choose The Best Answer
 
1. According to modern periodic law, the physical and chemical properties of elements are the periodic functions of them?
(a) Density       (b) Atomic Number     (c) Mass Number           (d) Atomic Mass
 
2. Highest electropositive element in the periodic table is
(a) Cs             (b) Rb                         (c) K                             (d) Na
 
3. The correct order of the size of C, N, P, S follows the order
(a) N < C < P < S       (b) C< N < S < P         (c) C < N < P < S        (d) N < C < S < P
 
4. Which of the following oxide is most acidic?
(a) Na2O        (b) Al3O2                   (c) P2O5                         (d) SO3
 
5. The ionization enthalpy of nitrogen is more than that of oxygen molecules because of
(a) greater attraction of electrons by the nucleus     (b) extra stability of the half-filled p-orbitals
(c) smaller size of nitrogen                                    (d) more penetrating effect
 
II. Fill in the Blanks
 
1. Lightest metal in s-block elements is _____________ .
 
2. Most electronegative elements belong to ___________ group.
 
3. The elements above atomic number 92 are called ___________.
 
4. The inner-transition elements belong to ________ block of the periodic table and are shown separately at the ________ of the periodic table.
 
5. Ca2+ has smaller ionic radius than K+ ion because it has ___________.
 
III. Assertion and Reasoning Questions:
 
Directions: (Questions 1 to 4).
 
A.If both Assertion & Reason are true and the reason is the correct explanation of the assertion.
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion.
C. If Assertion is true statement but Reason is false.
D. If both Assertion and Reason are false statements.
 
1. Assertion: Ionic radius of Na+ is smaller than Na
   Reason: Effective nuclear charge of Na+ is higher than Na
 
2. Assertion: First ionization enthalpy of N is higher than O.
    Reason: Extra stability of fully filled up 2p subshell of N atom
 
3. Assertion: Electron gain enthalpy of Cl is more negative than F atom.
    Reason: F is more electronegative than Cl atom.
 
4. Assertion: First ionization enthalpy of Gallium is higher than aluminum.
    Reason: Weak shielding effect of 3d subshell is Gallium.
 
IV Descriptive Questions:
 
1. Cations are smaller than their parent atom whereas anions are larger in size than their parent atom. Explain.
 
2. Among the element of the third period, pick out the element with
a) Highest first IE                    b) Largest atomic radius
c) Most reactive non-metal       d) Most reactive metal
 
3. The reactivity of halogens decrease down the group but of alkali metals increases down the group. Why?
 
4. Which atom in each of the following pairs has greater first IE? Give reasons.
a) B or C          b) N or O           c) F or Ne          d) Cl or F       e) K or Ar    f) Kr or Xe
 
5. Electron gain enthalpy of Mg is positive. Explain.
 
6. Predict the position in the periodic table
a) (n-1)d1 ns2 where n=4 b) (n-1) d2 ns2 where n=5
 
 
Please click on below link to download CBSE Class 11 Chemistry Periodic Classification Worksheet
 
~ Class 11 Chemistry (Old Chapters)
CBSE Class 11 Atmospheric Pollution Worksheet A
CBSE Class 11 Behaviour of Real Gases Worksheet A
CBSE Class 11 Chemistry Environmental Chemistry Worksheet
CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set A
CBSE Class 11 Chemistry Environmental Chemistry Worksheet Set B
CBSE Class 11 Chemistry Environmental Worksheet
CBSE Class 11 Chemistry Hydrogen Worksheet Set A
CBSE Class 11 Chemistry Hydrogen Worksheet Set A
CBSE Class 11 Chemistry Hydrogen Worksheet Set B
CBSE Class 11 Chemistry Hydrogen Worksheet Set B
CBSE Class 11 Chemistry P-Block Elements Worksheet Set A
CBSE Class 11 Chemistry P-Block Elements Worksheet Set B
CBSE Class 11 Chemistry P-Block Elements Worksheet Set C
CBSE Class 11 Chemistry P-Block Elements Worksheet Set C
CBSE Class 11 Chemistry S-Block Elements Worksheet Set A
CBSE Class 11 Chemistry S-Block Elements Worksheet Set B
CBSE Class 11 Chemistry States of Matter Worksheet Set A
CBSE Class 11 Chemistry States of Matter Worksheet Set A
CBSE Class 11 Chemistry States of Matter Worksheet Set B
CBSE Class 11 Chemistry The p-Block Elements Worksheet Set A
CBSE Class 11 Chemistry The s-Block Elements Worksheet Set A
CBSE Class 11 Chemistry The s-Block Elements Worksheet Set B
CBSE Class 11 General Characteristics of Compounds of the Alkaline Earth Metals Worksheet A
CBSE Class 11 General Characteristics of p-block elements Worksheet A
CBSE Class 11 General Characteristics of the Compounds of the alkali metals Worksheet A
CBSE Class 11 Group 1 Elements Alkali Metals Worksheet A
CBSE Class 11 Group 2 Alkaline Earth Metals Worksheet A
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CBSE Class 11 Group 14 Elements The Carbon family Worksheet A
CBSE Class 11 Hydrides Worksheet A
CBSE Class 11 Hydrogen Peroxide Worksheet A
CBSE Class 11 Ideal Gas equation Worksheet A
CBSE Class 11 Important Compounds of Calcium Worksheet A
CBSE Class 11 Important Compounds of Carbon and Silicon Worksheet A
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Chapter 3 Classification of Elements and Periodicity in Properties CBSE Class 11 Chemistry Worksheet

Students can use the Chapter 3 Classification of Elements and Periodicity in Properties practice sheet provided above to prepare for their upcoming school tests. This solved questions and answers follow the latest CBSE syllabus for Class 11 Chemistry. You can easily download the PDF format and solve these questions every day to improve your marks. Our expert teachers have made these from the most important topics that are always asked in your exams to help you get more marks in exams.

NCERT Based Questions and Solutions for Chapter 3 Classification of Elements and Periodicity in Properties

Our expert team has used the official NCERT book for Class 11 Chemistry to create this practice material for students. After solving the questions our teachers have also suggested to study the NCERT solutions  which will help you to understand the best way to solve problems in Chemistry. You can get all this study material for free on studiestoday.com.

Extra Practice for Chemistry

To get the best results in Class 11, students should try the Chemistry MCQ Test for this chapter. We have also provided printable assignments for Class 11 Chemistry on our website. Regular practice will help you feel more confident and get higher marks in CBSE examinations.

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