NEET Exam > NEET Videos > Chemistry Class 11 > Introduction: Some Basic Concepts of Chemistry
Introduction: Some Basic Concepts of Chemistry Video Lecture | Chemistry Class 11 - NEET
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FAQs on Introduction: Some Basic Concepts of Chemistry Video Lecture - Chemistry Class 11 - NEET
| 1. What are some basic concepts of chemistry? |  |
Ans. Some basic concepts of chemistry include elements, compounds, mixtures, atoms, molecules, and chemical reactions. Chemistry is the study of matter and its properties, and these concepts help us understand the fundamental building blocks of matter and how they interact.
| 2. What is the difference between an element and a compound? | |
Ans. An element is a pure substance that cannot be broken down into simpler substances by chemical means. It consists of only one type of atom. Examples of elements include hydrogen, oxygen, and carbon. On the other hand, a compound is a substance formed when two or more elements chemically combine in fixed proportions. Compounds can be broken down into their constituent elements through chemical reactions.
| 3. What is the difference between a mixture and a compound? | |
Ans. A mixture is a combination of two or more substances that are physically mixed together but can be separated by physical means. The components of a mixture retain their individual properties and do not chemically react with each other. Examples of mixtures include air, saltwater, and sand. In contrast, a compound is a substance formed when two or more elements chemically combine in fixed proportions. Compounds have different properties from their constituent elements and can only be separated through chemical reactions.
| 4. What is an atom and a molecule? | |
Ans. An atom is the smallest unit of an element that retains its chemical properties. Atoms are composed of protons, neutrons, and electrons. Each element is made up of specific types of atoms. A molecule, on the other hand, is a group of atoms held together by chemical bonds. Molecules can be made up of atoms of the same element (diatomic molecules like O2) or different elements (compounds like H2O).
| 5. What are chemical reactions? | |
Ans. Chemical reactions are processes in which one or more substances are transformed into new substances with different properties. During a chemical reaction, the bonds between atoms are broken and reformed, resulting in the formation of new molecules or compounds. Examples of chemical reactions include combustion, oxidation, and decomposition. Chemical reactions are essential in various fields, such as industry, medicine, and environmental science.
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Dec 22, 2024 Last updated |
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