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FAQs on Revision Notes: Solid - Chemistry Class 12 - NEET

1. What is the definition of a solid?
Ans. A solid is a state of matter characterized by a definite shape and volume. It has closely packed particles that are held together by strong intermolecular forces.
2. How are solids different from liquids and gases?
Ans. Solids have a fixed shape and volume, whereas liquids take the shape of their container but have a fixed volume, and gases have neither a fixed shape nor volume. Solids also have stronger intermolecular forces compared to liquids and gases.
3. What are the different types of solids?
Ans. There are four main types of solids: molecular solids, ionic solids, metallic solids, and covalent network solids. Molecular solids are composed of individual molecules held together by weak intermolecular forces. Ionic solids consist of positive and negative ions held together by strong electrostatic forces. Metallic solids have a lattice structure of metal atoms surrounded by a "sea" of delocalized electrons. Covalent network solids are made up of a continuous network of covalent bonds.
4. How do solids change state?
Ans. Solids can change state through two processes: melting and sublimation. Melting occurs when heat is applied to a solid, causing it to transition into a liquid state. Sublimation, on the other hand, is the direct transition of a solid into a gaseous state without passing through the liquid phase. This occurs when the vapor pressure of the solid exceeds the atmospheric pressure.
5. What are some examples of common solids?
Ans. Common examples of solids include wood, metal, plastic, glass, ice, salt, sugar, and rocks. These substances have a definite shape and volume at room temperature.
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