Which one of the following bonds produces a solid that reflects light ...
Van der Waal's bonding cannot be the answer as they have low melting point. covalent compounds are not good conductors of electricity. ionic solids do not conduct electricity when they are in solid state. metallic solids are those which conduct electricity and have high melting point. also, their electrical conductivity decreases with increasing temp as drift velocity decreases.
Which one of the following bonds produces a solid that reflects light ...
Metallic Bonding
Metallic bonding is the bond formed between metal atoms in a solid. It is characterized by the delocalization of valence electrons throughout the crystal lattice. This leads to the formation of a "sea of electrons" that is free to move within the structure.
Solid that reflects light in the visible region
Metals are known for their shiny appearance, known as luster, which is the result of their ability to reflect light in the visible region. When light strikes the surface of a metal, the free electrons in the metallic bond interact with the electric field of the light wave and cause it to be reflected. This reflection gives metals their characteristic shine.
Electrical conductivity decreases with temperature
In metals, the delocalized electrons are responsible for electrical conductivity. At higher temperatures, the atoms vibrate more vigorously, leading to increased collisions between the electrons and the lattice. These collisions impede the flow of electrons and therefore decrease electrical conductivity. As a result, the electrical conductivity of metals generally decreases with increasing temperature.
High melting point
Metals have high melting points due to the strength of metallic bonding. The positive metal ions are held together by the sea of delocalized electrons, which form a strong attraction. This strong attraction between the positive ions and the delocalized electrons requires a significant amount of energy to overcome and break the metallic bond. Hence, metals generally have high melting points.
Conclusion
Based on the given characteristics, metallic bonding is the most suitable choice. Metallic bonding produces a solid that reflects light in the visible region, exhibits a decrease in electrical conductivity with temperature, and has a high melting point. These properties are a result of the delocalization of electrons within the metallic bond, which allows for the reflection of light and the flow of electricity. Additionally, the strong attraction between the positive ions and the delocalized electrons contributes to the high melting point of metals.
To make sure you are not studying endlessly, EduRev has designed NEET study material, with Structured Courses, Videos, & Test Series. Plus get personalized analysis, doubt solving and improvement plans to achieve a great score in NEET.