Name and describe the different allotropes of carbon.

Q: What do amorphous forms of graphite include?

A: What do amorphous forms of graphite include has to be given.

Q: The below image is an example of what type of unit cell?

A:

Q: What are the two types of layer arrangement in metals? Which has the closer packing?

A: The two types of layer arrangement in metals are : Simple Squares Hexagonal Layer   Simple squares…

Q: Predict the effect (if any) of an increase in temperature on the electrical conductivity of (a) a…

A: Conductor: It passes the current. There is no energy space between valence band and conduction…

Q: What is the difference between the hardening process of Portland cement and the hardening process of…

A: Portland cement is a powdered mixture, and its hardening process is different from that of clays.…

Q: Give some examples of Covalent-network solids?

A: Covalent-network solids are a network of atoms ( can be of the same element or different element)…

Q: Which allotrope of sulphur is thermally stable at room temperature?

A: Sulfur exists in various allotropes. The most important among them are: Rhombic Sulfur (α-sulfur)…

Q: What allows graphite to conduct electricity?

A: Graphite is the most stable allotrope of Carbon. It is the only non-metal that conducts electricity.…

Q: Two students were discussing about the Linde's process, when one of them suggested that Liquefaction…

A: The two factors on which liquification of gases depends are: Temperature Pressure Temperature: At…

Q: explain why graphite is a good solid lubricant

A: Why graphite is a good solid lubricant ?

Q: Write amorphous carbon

A: Amorphous carbon is basically is reactive carbon which not  having crystalline structure.

Q: Classify each of the following as a conductor, insulator, or semiconductor: (a) phosphorus; (b)…

A: The given element has to be classified as conductor, insulator, or semiconductor.

Q: Explain why the atomic structure of diamond is different from the atomic structure of graphite?

A: it has a crystalline lattice each carbon in diamond is SP3 hybridized and attached with other Carbon…

Q: Use the hybridization and structures of graphite and diamond to explain why graphite conducts…

A: The objective of the question is to explain the reason behind the good electrical conductivity of…

Q: What is the molecular formula of the compound represented by the unit cell below? Xenon Fluorine

A: The smallest repeating unit with full symmetry of crystal structure is known as unit cell.

Q: which variables must be controlled and in what manner to produce diamond from graphite?

A: Graphite and diamond are completely made up of carbon, in-fact are referred as allotropes of carbon…

Q: What is difference between the structure of diamond and graphite?

A:

Q: Define the term, Band-Gap?

A: Electrons are present in the orbits around the nucleus. On coming together of two charges together…

Q: Which would you expect to be the more ductile element,(a) Ag or Mo, (b) Zn or Si? In each case…

A: Silver is a more ductile element than molybdenum. Ag has more valence electrons which makes the…

Q: Sketch a diagram to illustrate the band structure of diamond, assuming no defects

A: The carbon atoms in diamond undergo hybridization and each carbon atom forms four sigma bonds with…

Q: Define the term Ceramics? Give some examples?

A: The materials that are resistant to corrosion, hard yet brittle is known as ceramics.

Q: (a) What are the C¬C¬C bond angles in diamond?(b) What are they in graphite (in one sheet)? (c)…

A: a) The C-C-C bond angle in carbon is 109.5 degrees. Here all the carbon are sp3 hybridise and…

Q: <p>Explain why the graphite structure of carbon allows graphite to be used as a lubricant, but…

A: In graphite, flat sheets of carbon are connected together in the form of interconnected hexagonal…

Q: Why Graphite is more compressible than diamond ?

A: Diamond and graphite are allotropes of carbon. The similarity between the two is the constituent…

Q: Why does graphite conduct electricity?

A: Graphite is an allotrope of carbon. It is a covalent solid. It has a trigonal planar geometry. The…

Q: How are the properties of high-tech ceramics the same asthose of traditional clay ceramics, and how…

A: Ceramics are nonmetallic, inorganic materials that get permanently hardened on heating.  Traditional…

Q: Distinguish between isotropic and anisotropic substances.To which category do liquid crystals…

A: Liquid crystals are the substances that have a crystalline structure and packed with a high degree…

Q: 10. The isotactic form of polypropane is

A: Answer: Option A  Polypropylene (PP) is a linear and saturated hydrocarbon polymer. Its standard…

Q: Which allotropic form of carbon are conductor and which are non conductor's and why?

A: Allotropy is defined as the property of some chemical elements to exist in two or more different…

Q: Mention the main compounds which constitute Portland cement.

A: Portland cement is a binding material in the form of a finely ground powder. It is usually gray in…

Q: an amorphous solid is highly ordered true or false

A: Amorphous solid is a short range order.

Q: Explain why graphite can conduct electricity, but diamond does not.

A: The reason is as follows,

Q: explain why graphite can be used as a lubricant

A: Lubricants are the substances or compounds which are used to reduce friction between two movable…

Q: 5. Consider the properties of four substances (A, B, C and D) in the following table. Substance A B…

A: Given table is :  Consider the properties of the four substances, which substance is most likely…

Q: What is the coordination number of atoms in the diamond structure?

A: A diamond is a precious stone and crystalline form of pure carbon with its arranged atoms.

Q: What type of semiconductor is obtained when silicon is doped with arsenic?

A: Silicon belongs to group 14. It has atomic number 14 and has 4 valence e-. Arsenic belongs to group…

Q: Draw the 2D network structure of crystalline AND amorphous B2O3

A: Given that, the 2D network structure of crystalline AND amorphous B2O3

Q: What is a polymorph?

A: Polymorphism is the concept of Material Science which is about the ability of a solid material…

Q: ength of an edge of the unit cell?

A:

Q: Why does conductivity of silicon increase with the rise in temperature.

A: The conductivity of silicon increases with the rise in temperature.

Q: 1. What are the principal natural processes that affect the petrophysical properties of sedimentary…

A: The main petro-physical properties of sedimentary rocks are thermal diffusivity, conductivity,…

Q: Q) who many allotropes does carbon element has? Which is harder

A: Allotropes of  carbon element is given by following – ★ Diamond ★ Graphite ★ C-60…

Group 14 Elements

The following elements come under group 14 of the periodic table.