CBSE stands for Central Board of Secondary Education. It conducts exams for Class 9 and takes the responsibility of creating the CBSE Syllabus for Class 9 Chemistry. All students are encouraged and advised to have detailed knowledge regarding the CBSE Class 9 Chemistry syllabus in order to have a clear and concise idea about the exam pattern, upcoming exams, and marking scheme. In this article, students will know about the CBSE Class 9 Chemistry question paper details for the academic year 2021-22. These details include the names of the units, main topics, marking scheme, and practical examples.

Chemistry is one of the main concepts of science. It includes chemical formulas, preparations, and experiments. These topics help to lay a solid foundation for higher education. All the chapters are further incorporated in the secondary studies and higher classes.

Class 9 CBSE Science syllabus:

The overview of science units and marking scheme is as follows:

Unit No.	Unit Name	Marks	Periods
I	Matter – Its Nature and Behavior	23	50
II	Organization in the Living World	20	45
III	Motion, Force and Work	27	60
IV	Our Environment	06	15
V	Food; Food Production	04	10
	Total	80
	Internal Assessment	20
	Grand Total	100

Class 9 CBSE Chemistry Chapters

The chemistry chapters are listed as follows:

Chapters	Chapter Name
I	Matter in Our Surroundings
II	IS Matter Around Us Pure
III	Atoms and Molecules
IV	Structure of the Atom

Chemistry holds 23 marks in total, and it includes the Unit “Matter – Its Nature and Behavior.” The remaining 57 marks belong to Physics and Biology.

CBSE Class IX Detailed chapter-wise analysis:

The detailed chapter-wise analysis of Class 9 Chemistry is as follows:

Unit	Chapter Analysis	Periods
Unit I – Matter – Its Nature and Behaviour	Matter In Our Surroundings: The chapter contains details about evaporation, matter, states of matter and their interconversion. It includes topics like condensation, freezing, melting, evaporation and sublimation.   Is Matter Around Us Pure: The chapter consists of elements, mixtures and compounds. It explains the homogeneous and heterogeneous mixtures, suspensions and colloids.   Atoms and Molecules: Atoms and Molecules chapters explain the law of constant proportions, mole concept, the concept of atomic and molecular masses. It describes the relationship between the mole to mass of the particles and numbers.   Structure of the Atom: The chapter consists of electrons, protons and neutrons. It also includes topics like valency, the chemical formulas of common compounds, isobars and isotopes.	50

As stated in the table above, one unit solely explains the chemistry topics. It consists of four different chapters. The first chapter “Matter In Our Surroundings” contains details about evaporation, matter, and states of matter and their interconversion. It also includes topics like condensation, freezing, melting, evaporation, and sublimation. The chapter “Is Matter Around Us Pure” consists of elements, mixtures, and compounds. It explains homogeneous and heterogeneous mixtures, suspensions and colloids. The chapter also includes topics like centrifugation, chromatography, and physical and chemical changes. The next chapter “Atoms and Molecules” explains the law of constant proportions, mole concept, and the concept of atomic and molecular masses. It describes the relationship between the mass of the particles and numbers. The last chapter “Structure of the Atom ” consists of electrons, protons, and neutrons. It also includes topics like valency, chemical formula of common compounds, isobars, and isotopes. These chapters hold a weightage of 23 marks in total.

CBSE chemistry class 9 previous year question paper 2021 format:

The CBSE Chemistry Class 9 Previous Year Question paper format and weightage are as follows:

Sections	Total Questions	Marks
Section A	1–4	4
5–13	18
14–22	27
23–25	15
Section B	26– 41	16
	Total	80
	Internal Assessment	20
	Grand Total	100

The above table shows the overall marks distribution of the question paper. The first four questions consist of very short answer type questions of one mark each. The next nine questions are short questions of 2 marks each. Questions 14 to 22 are short type questions of 3 marks each, and questions 23 to 25 are long answer type questions of four marks each. Section B of the question paper has 16 multiple choice questions of one mark each.

CBSE class 9 chemistry experiments:

Term I:

• Preparation of the true solution of sugar, alum, and common salt
• Preparation of a suspension of fine sand, chalk powder, and soil in water
• Preparation of a mixture and a compound
• Perform the reactions as follows:
• Iron with copper sulphate solution in water
• Heating the crystals of copper sulphate
• Diluting sulphuric acid with zinc

Term II:

• Determine the density of solid using a measuring cylinder and spring balance
• Verify the law of conservation of mass in a chemical reaction

FAQs of Class 9 Cbse Chemistry

1. Why does air pollution increase during the winter season?

Due to the condensation of water, fog is formed in cold weather. Also, smoky un-decomposed particles of carbon are released due to the combustion of fossil fuels. These particles combine with the fog, thereby forming smog. Smog reduces the quality and visibility of the air and causes air pollution.

2. Mention the elements and the ratio by mass of the elements present in:

Carbon dioxide

Ammonia

The elements and ratio by mass of the elements are as follows:

• Carbon dioxide – Carbon and Oxygen (Ratio by mass = 3:8)
• Ammonia – Nitrogen and hydrogen (Ratio by mass = 14:3)

3. Write the chemical formula of the following elements:

Ammonium dichromate

Iron (III) oxide

Calcium phosphate

Aluminium sulphate

The chemical formula is as follows:

• Ammonium dichromate –  (NH₄)₂Cr₂O₇
• Iron (III) oxide – Fe₂O₃
• Calcium phosphate – Ca₃(PO₄)₂
• Aluminium sulphate – Al₂(SO₄)₃

4. What is the difference between isotopes and isobars?

Isotopes are atoms of an element with the same atomic numbers but with different mass numbers. For example, hydrogen has three isotopes with the same atomic number of 1. However, the mass numbers are different, i.e., 1, 2, and 3.

However, isobars are atoms of different chemical elements with the same mass number but different atomic numbers. For example, 40S, 40 Cl, and 40K. All these three elements have different atomic numbers, but the mass number is the same.

5. Mention any two medicinal uses of isotopes.

The two medicinal uses of isotopes are as follows:

• Isotope of Cobalt – Cancer treatment

Isotope of Iodine – Goitre treatment