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NCERT Textbook: Some Basic Concepts Of Chemistry | Chemistry Class 11 - NEET PDF Download

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FAQs on NCERT Textbook: Some Basic Concepts Of Chemistry - Chemistry Class 11 - NEET

1. What are the basic concepts of chemistry?
Ans. The basic concepts of chemistry include elements, compounds, mixtures, chemical reactions, and atomic structure. These concepts form the foundation of understanding chemical reactions and their applications in various fields.
2. How are elements different from compounds?
Ans. Elements are pure substances that cannot be broken down into simpler substances by chemical means. They are made up of only one type of atom. On the other hand, compounds are substances composed of two or more elements that are chemically combined in fixed ratios. Compounds can be broken down into simpler substances through chemical reactions.
3. What are mixtures? Provide examples.
Ans. Mixtures are substances that are composed of two or more pure substances physically combined. The components of a mixture can be separated by physical means, such as filtration or evaporation. Examples of mixtures include air (a mixture of gases), saltwater (a mixture of salt and water), and trail mix (a mixture of different types of nuts and dried fruits).
4. How do chemical reactions occur?
Ans. Chemical reactions occur when there is a rearrangement of atoms in the reactant molecules to form new products. This rearrangement involves breaking and forming chemical bonds. Chemical reactions can be represented by balanced chemical equations, which show the reactants on the left side and the products on the right side of the equation.
5. What is atomic structure?
Ans. Atomic structure refers to the arrangement and organization of subatomic particles within an atom. Atoms are composed of a positively charged nucleus, which contains protons and neutrons, surrounded by negatively charged electrons in energy levels or shells. The atomic structure determines the chemical properties and behavior of elements.
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