NCERT Solutions Class 11 Chemistry Chapter 1

NCERT Solutions for Class 11 Chemistry Chapter 1 – Some Basic Concepts of Chemistry

Extramarks Chemistry class 11 chapter 1 NCERT solutions were created keeping the needs of Class 11 students in mind by chemistry subject matter experts. The NCERT Solutions on this page provide step-by-step explanations to assist students in answering comparable questions that may appear on their term – I examinations.

NCERT Solutions for Class 11 Chemistry Chapter 1 have been developed by qualified teachers in a simple and clear language in compliance with the most recent CBSE Syllabus 2022-23 and its guidelines. . The answers cover the fundamental ideas in order to provide a high-quality learning experience for Class 11 students. To complete a portion of the term – I syllabus before the first term test, you can get the Class 11 Chemistry NCERT Solutions Chapter 1 from Extramarks’ website.

Our chemistry experts explain the answers to all the questions using the latest NCERT syllabus following the CBSE pattern. Some essential topics in Chemistry Class 11 NCERT Solutions are provided to make your learning easier and more interesting.

 NCERT Solutions for Class 11 Chemistry Chapter 1- Some Basic Concepts of Chemistry

CBSE Class 11 Chemistry Chapter 1: Chapter Summary 

Chemistry is crucial because it affects every aspect of life. Chemistry subjects have the qualities and structure of substances, as well as the changes that they undergo. Matter is found in all substances and can exist in three states: solid, liquid, or gas. Students will learn about the nature of materials and chemical rules of combination in this chapter. This chapter will assist students in establishing a solid foundation in Chemistry. Students will learn about atomic and molecular masses, as well as the mole idea, chemical reactions, and molecular formulas.

As a result, the chapter’s practical problems will aid students in better understanding the topics. The Law of Conservation of Mass, the Law of Definite Proportions, the Law of Multiple Proportions, the International System of Units, Weights and Measures, and other concepts will be covered. This is one of the foundational chapters in Chemistry, but it doesn’t carry much weightage.  Make sure you understand the whole chapter before answering the questions.

Important Topics: Mole Fraction, Stoichiometry, Equivalent Mass and Normality, Atomic Number, Mass number and Isotypes, Avogadro’s Law and Percent Composition.

NCERT Solutions for Class 11 Chemistry Chapter 1 – A Quick  glance through  the Chapter

Atomic Mass and Molecular Mass

One mass unit is defined as a mass that is one-twelfth the mass of one carbon–12 atoms. The Molecular Mass is the sum of the atomic masses of the atoms in a molecule. You may get it by multiplying each element’s mass by the number of atoms in each of its atoms and adding the results. Gram molecular mass refers to molecular mass expressed in grams. The sum of all atoms’ atomic masses during a formula unit of the compound is known as the formula mass. The mole is the amount of substance in a system that includes the same number of elementary entities as there are atoms in 0.012 kilograms of carbon-12; it is denoted by the sign -mol. This number of entities per mol is so important that it has its own name and symbol. In honour of Avogadro, it is known as the ‘Avogadro constant.’

Concepts of Mass, Weight, Volume and Temperature

Mass, which is a constant quantity, is the matter present in a substance. The kilogram is the SI unit for mass (Kg). Weight, on the other hand, is the force exerted on a substance by gravity. Due to variations in gravity, it varies from location to place. The SI unit of weight is the Newton. Again, volume refers to the amount of space occupied by a body. In addition, the cubic metre is a SI unit. A litre is another common measurement. One cubic metre equals 1000 litres. The density, which has the SI unit Kg per cubic metre or gram per cubic metre, is the quantity of mass per unit volume. The measurement of heat in a substance is called temperature. SI unit is Kelvin, and other standard units are Degree Celsius (°C) and degree. Fahrenheit (°F).

How can our subject experts help you to improve yourself?

Along with NCERT Solutions Class 11 Chemistry Chapter 1 of all topics, Extramarks also offers past years’ question papers to assist you to understand the question pattern. The question papers come with answer keys that are prepared by our qualified faculty experts with years of experience. Students can also attend LIVE online sessions for one-on-one interaction, and to clarify their doubts related to the topic.

Why Should You Prefer NCERT Solutions prepared by Extramarks for Class 11 Chemistry Chapter 1?  Some Basic Concepts of Chemistry prepared by the subject Experts of Extramarks?

The large number of new concepts discussed make Chapter 1 difficult to comprehend for students. Extramarks offers Chapter 1 NCERT Solutions for Class 11 Chemistry to explain the concepts in a well-organised, comprehensible, and straightforward manner. It follows the latest syllabus to help you get better grades in tests. The solutions are prepared by Extramarks subject-matter experts who have years of experience in teaching, which itself speaks of the credibility and accuracy of the learning material.

The NCERT Solutions presented here have been created with one goal in mind: to assist students in preparing for their term-by-term examinations and passing them with flying colours. The NCERT Solutions comprise all of the exercise questions from the NCERT textbook, thus they cover a lot of significant questions that might come in the term I and II exams.

FAQs (Frequently Asked Questions)

Absolutely, Extramarks provides step-by-step answers to NCERT Solutions for Class 11 Chemistry Chapter 1. This allows students to study all the concepts in detail and clarify their doubts way ahead of exams. 

The chapter covers basic chemistry ideas that are helpful for students in the medical and non-medical streams. Atomic mass, weight, molecular mass, temperature, and other concepts are introduced. Chemical equations and formulae are also discussed and introduced in this chapter. Students must be comprehensive with these topics because they serve as the foundation for concepts that will be studied later in the class and in Class 12. These are also crucial for board exams and other competitive exams.

The Law of multiple proportions says that when two elements mix to generate two or more compounds, the masses of one of the elements which combine with a fixed mass of the other have an easy ratio to each other. e.g. Carbon and Oxygen combine to form two different chemical compounds- carbon dioxide and carbon monoxide. The masses of oxygen combined with a definite mass of carbon in CO and CO2 are 16 and 32, respectively. These masses of oxygen bear a ratio of 32: 16 or 2: 1 with one another. For example, sulphur and oxygen combine to form two compounds, namely, sulphur trioxide and sulphur dioxide.