NCERT Solutions for Class 9 Social Science History Chapter 4 Forest Society and Colonialism

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The British administration believed that Indian farmers were causing harm to the forests through their agricultural practices. They aimed to assume control over forest cultivation and implement scientific forestry methods. Consequently, they introduced various laws to restrict the local population’s access to forest resources. However, the British themselves continued to exploit the forests for commercial …

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NCERT Solutions for Class 9 Social Science History Chapter 5 Pastoralists in the Modern World

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Nomads are individuals who lead a migratory lifestyle, lacking a fixed abode and moving from one region to another to sustain themselves. Even in contemporary times, we encounter nomads and nomadic communities worldwide who do not possess permanent dwellings. Among the various types of nomads, there exists a group known as pastoral nomads, who engage …

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Molecules

Molecule

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What is a Molecule? A molecule is a group of two or more atoms held together by chemical bonds. These bonds can be covalent, ionic, or metallic, depending on the nature of the atoms involved and the conditions under which the molecule is formed. Structure of Molecule Molecules can be made up of atoms of …

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Inertness of Noble Gases

Inertness of Noble Gases

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Inertness of Noble Gases Noble gases are a group of elements that are chemically inert, meaning that they do not easily react with other elements. This is because they have a full outer electron shell, which gives them a stable electronic configuration. The noble gases, also known as inert gases, include helium (He), neon (Ne), …

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Mole Concept

Mole concept

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What is Mole Concept? The mole concept is a fundamental concept in chemistry that relates the mass of a substance to the number of particles (atoms, molecules, or ions) it contains. A mole is a unit of measurement used to express the amount of a substance, just as the gram is used to express the …

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Molecular Mass

Molecular mass

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What is Molecular Mass? The molecular mass of a substance is the mass of a single molecule of that substance. It is measured in daltons (Da), which is a unit of mass equal to one-twelfth the mass of a carbon-12 atom. For example, the molecular mass of water (H2O) is 18 Da, because it is …

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Formula of a compound

Chemical Formula of a compound

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The Formula of a Compound: Understanding the Composition of Chemical Substances The formula of a compound provides valuable information about the composition and arrangement of atoms within a chemical substance. It serves as a concise representation of the elements and their respective ratios present in a compound. Understanding compound formulas is crucial in the field …

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Effect of increased pressure on the boiling point of water

Effect of Increased Pressure on the Boiling Point of Water

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The boiling point of a substance is defined as the temperature at which its vapor pressure equals the atmospheric pressure. The relationship between pressure and boiling point is well established, and it can be observed that increasing the pressure on a substance generally results in an increase in its boiling point. This relationship holds true …

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