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NCERT Exemplar Class 11 Chemistry Chapter 1: Some Basic Concepts of Chemistry (Free PDF)

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eSaral Academic and Editorial Team

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Summary

NCERT Exemplar Class 11 Chemistry Chapter 1 (Some Basic Concepts of Chemistry) has 45 practice questions in six types: two kinds of MCQs, short answer, matching, assertion-reason and long answer, with answers at the end of the PDF. This page gives the free chapter PDF, a topic list, a formula revision table and tips to use it for CBSE Class 11, JEE Main and NEET practice.

NCERT Exemplar Class 11 Chemistry Chapter 1 - Some Basic concepts of Chemistry - Free PDF Download

Are you a Class 11 student looking for NCERT Exemplar Class 11 Chemistry Chapter 1, “Some Basic Concepts of Chemistry”? You can download the chapter PDF below. This chapter builds the base for mole-based calculations used throughout Chemistry, so extra practice here saves time in later chapters such as Thermodynamics, Equilibrium and Redox Reactions.

NCERT Exemplar Class 11 Chemistry Chapter 1 PDF Download

Download NCERT Exemplar Class 11 Chemistry Chapter 1 PDF

The PDF is 13 pages long and includes the answers at the end. You can also preview the pages below before downloading.

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What Is in NCERT Exemplar Class 11 Chemistry Chapter 1?

NCERT Exemplar is a supplementary problem book that goes beyond the textbook exercises. Chapter 1 contains 45 questions in six types:

Question type

Question numbers

Number of questions

Multiple choice (Type-I, one correct option)

1–15

15

Multiple choice (Type-II, one or more correct options)

16–22

7

Short answer

23–35

13

Matching

36–37

2

Assertion and reason

38–41

4

Long answer

42–45

4

Topics Covered in NCERT Exemplar Class 11 Chemistry Chapter 1

  • Accuracy and precision of measurements
  • Significant figures and SI units
  • Temperature scales and units of physical quantities
  • Laws of chemical combination: conservation of mass, definite proportions, multiple proportions and Gay-Lussac’s law
  • Atomic mass, average atomic mass and the mole concept
  • Mass percent, empirical formula and molecular formula
  • Concentration terms: molarity, molality and mole fraction
  • Dilution of solutions
  • Stoichiometry and limiting reagent

Formulas to Revise Before You Attempt Chapter 1

Quantity

Formula

Number of moles

n = given mass ÷ molar mass

Molarity (M)

moles of solute ÷ volume of solution in litres

Molality (m)

moles of solute ÷ mass of solvent in kg

Mole fraction of A

moles of A ÷ total moles of all components

Mass percent of an element

(mass of the element in the compound ÷ molar mass of the compound) × 100

Dilution

M₁V₁ = M₂V₂

Exemplar problems on concentration expect these formulas to be second nature. Our page on the molarity formula explains molarity with examples.

How to Use NCERT Exemplar Class 11 Chemistry Chapter 1 for Practice

  1. Finish the NCERT Class 11 Chemistry textbook chapter and its exercise first.
  2. Attempt the Exemplar questions without looking at the answers, type by type.
  3. Check your answers at the end of the PDF, then rework every question you got wrong.
  4. For numerical questions, write units at every step and check significant figures.
  5. Note your mistakes (for example, mixing up molarity and molality) and revise them before tests.

Keep one point in mind: the Exemplar was published several years ago, and a few questions or answers may use older conventions. For example, the answer to one question notes both the older and newer values for the molar volume of a gas at STP. Follow your teacher’s guidance and the current CBSE Class 11 Chemistry syllabus for what is required in exams.

Also Read

To watch free learning videos on Class 11 Chemistry by Kota’s top faculties, install the eSaral App.

Frequently Asked Questions

Where can I download NCERT Exemplar Class 11 Chemistry Chapter 1 PDF?

You can download the NCERT Exemplar Class 11 Chemistry Chapter 1 PDF from the download link on this eSaral page. The PDF covers “Some Basic Concepts of Chemistry” and includes the answers at the end.

How many questions are there in NCERT Exemplar Class 11 Chemistry Chapter 1?

NCERT Exemplar Class 11 Chemistry Chapter 1 has 45 questions: 15 Type-I MCQs, 7 Type-II MCQs, 13 short answer questions, 2 matching questions, 4 assertion-reason questions and 4 long answer questions.

What topics are covered in Class 11 Chemistry Exemplar Chapter 1?

It covers accuracy and precision, significant figures, laws of chemical combination, the mole concept, mass percent, empirical and molecular formulas, molarity, molality, mole fraction, dilution and limiting reagent.

Does the NCERT Exemplar Chapter 1 PDF include answers?

Yes. The answers are given at the end of the PDF for all question types. For some long answer questions, only a hint is given, so you may need to work out the full solution yourself.

How should I solve NCERT Exemplar Class 11 Chemistry Chapter 1 questions?

Finish the textbook chapter first, attempt the questions without looking at answers, then check and rework every mistake. Write units at each step in numerical problems. eSaral’s Class 11 Chemistry videos on the app can help if a concept is unclear.

What is the difference between NCERT Exemplar and NCERT Solutions for Class 11 Chemistry Chapter 1?

NCERT Solutions answer the questions in the textbook exercise. NCERT Exemplar is a separate book with additional, often higher-difficulty problems. Use NCERT Solutions for Class 11 Chemistry Chapter 1 first, then practise the Exemplar.

Is NCERT Exemplar Class 11 Chemistry Chapter 1 useful for JEE Main and NEET?

Yes, as practice. The mole concept and stoichiometry are basic skills for numerical problems in JEE Main and NEET Chemistry. However, the Exemplar alone is not enough, so also practise previous years’ papers and chapter tests.

Is the NCERT Exemplar part of the CBSE Class 11 Chemistry syllabus?

No. The Exemplar is a supplementary problem book. The CBSE syllabus follows the NCERT textbook, so use the Exemplar for extra practice and check your syllabus for the topics required.

Which topics in Chapter 1 are most important?

The mole concept, concentration terms (molarity, molality, mole fraction), mass percent and limiting reagent are used again in later chapters such as Solutions, Equilibrium, Redox and Thermodynamics, so give them extra time.

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eSaral Academic and Editorial Team

Team eSaral is the collective author profile for educational content created by eSaral’s teachers and academic contributors. The team draws on expertise from IIT graduates, doctors, experienced educators and subject specialists to develop resources for JEE, NEET and school students. Our articles aim to explain concepts clearly and help students study with confidence.

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