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Chemistry-Class-9

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9th Grade Science

Last Updated: 08 April 2026

9th grade science introduces students to the basic principles of chemistry, biology, and physics. It focuses on understanding the nature of matter, the structure of atoms ...read more

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Physics-Class-9

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School Resources

Chemical Compound

Last Updated: 23 July 2025

Chemical Compounds in chemistry are pure form of matter which are formed by combination of two or more elements in a fixed ratio. They are different from the mixture in wh...read more

School Learning

Chemistry-Class-9

Last Updated: 23 July 2025

Mole ratios refer to the ratio of the number of moles of one substance to the number of moles of another substance in a chemical reaction. These ratios are determined by t...read more

School Learning

Chemistry-Class-9

Electronic Configuration of First 30 Elements

Last Updated: 23 July 2025

Electronic configuration describes the distribution of electrons in atomic orbits. It tells about how electrons are arranged in the orbits inside the atom. Knowing any ele...read more

School Learning

Chemistry-Class-9

Last Updated: 23 July 2025

Sedimentation is the process where particles in a liquid or gas settle down over time due to gravity. It separates substances, allowing clearer liquid or gas above the set...read more

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School Learning

Chemistry-Class-9

Last Updated: 23 July 2025

Eutrophication is the process where water bodies accumulate excessive nutrients, primarily phosphates and nitrates, leading to the overgrowth of algae and other plant life...read more

School Learning

Chemistry-Class-9

Melting and Boiling Point

Last Updated: 23 July 2025

Melting and Boiling Point of a substance are the temperatures at which the state of matter changes from solid to liquid and liquid to gas respectively. These two temperatu...read more

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Geeks Premier League

Chemistry-Class-9

Geeks Premier League 2023

Cathode Ray Experiment

Last Updated: 16 May 2026

The cathode ray experiment was conducted by J. J. Thomson to study the internal structure of the atom. At that time, atoms were considered indivisible, but this experiment...read more

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Chemistry-Class-9

Physical-Chemistry

Geeks Premier League 2023

Heterogeneous Mixture

Last Updated: 23 July 2025

Heterogeneous mixture is a mixture in which the composition of the mixture is not uniform. A heterogeneous mixture consists of substances that remain physically separate. ...read more

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Chemistry-Class-9

Geeks Premier League 2023

Last Updated: 20 April 2026

Sublimation is a physical change in which a substance directly changes from the solid state to the gaseous state without passing through the liquid state. This process tak...read more

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Geeks Premier League

Chemistry-Class-9

Geeks Premier League 2023

What is an Electron?

Last Updated: 23 July 2025

Electrons are subatomic particles that have an elementary charge of (-1) magnitude. The charge held by an electron is equal in magnitude and has the opposite sign to the c...read more

School Learning

Chemistry-Class-9

Last Updated: 23 July 2025

Decantation is a process of separation of liquid from solid and other immiscible liquids by removing the liquid layer at the top from the layer of liquid or solid below. I...read more

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Chemistry-Class-9

Physical-Chemistry

Thin Layer Chromatography

Last Updated: 23 July 2025

Thin layer chromatography in chemistry is a versatile and widely used chromatographic technique that plays a vital role in the field of analytical chemistry. Thin-layer ch...read more

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Chemistry-Class-9

Geeks Premier League 2023

Last Updated: 23 April 2026

A pure substance is a material made up of only one kind of particle. It has a fixed composition and definite properties throughout. All parts of a pure substance are the s...read more

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Chemistry-Class-9

Geeks Premier League 2023

Chemical Change

Last Updated: 23 July 2025

Chemical Changes are also known as chemical reactions. The word "Chemical Change" is made of 2 words i.e. chemical and change. Chemical refers to the composition and prope...read more

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Chemistry-Class-9

Physical-Chemistry

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