Sample Questions
Question 1: What is the Origin of Graphite?
Answer:
As a result of the sedimentary reduction of carbon compounds during metamorphism, graphite forms in metamorphic rocks. Meteorites and igneous rocks both contain graphite. Calcite, quartz, tourmaline, and micas are minerals that are linked with graphite. China, Canada, Mexico, Madagascar, and Brazil are the main export destinations for mined graphite, in order of tonnage.
Graphite coexists with silicate and troilite minerals in meteorites. Cliftonite is a small graphitic crystal found in meteoritic iron. Some minuscule grains have unique isotopic compositions, indicating that they existed before the Solar system was established. They are one of approximately 12 well-known mineral forms that predate the Solar System and have been found in molecular clouds. When supernovae detonated or low- to intermediate-sized stars evacuated their outer envelopes late in their lives, these minerals were produced in the ejecta. Graphite may be the Universe’s second or third oldest mineral.
Question 2: What are the Diamond’s Material Properties?
Answer:
Diamond is a solid form of pure carbon with atoms organised in a crystal structure. Solid carbon comes in a variety of allotropes depending on the chemical bond type. Diamond is one of the most prevalent pure carbon allotropes. The bonds in Diamond are sp3 orbital hybrids, and the atoms are arranged in tetrahedra, each with four nearest neighbours.
Tetrahedra are solid, and the bonds are strong, and Diamond has the most atoms per unit volume of any known substance, which is why it is both the least and the hardest to compress.It also has a higher density, ranging from 3520 kg/m3 in pure Diamond to 3150 to 3530 kg/m3 in natural diamonds (about three times the density of water).
Question 3: Why is it that graphite conducts electricity while diamond does not?
Answer:
Each carbon atom in a single crystal of diamond is surrounded by four other carbon atoms by covalent connections, forming the four corners of a regular tetrahedron. There are no free electrons since each carbon atom is bound by four covalent bonds. Diamond is a poor conductor of electricity due to the lack of free electrons within its crystalline structure
Every carbon atom in a single crystal of graphite is covalently connected to three other carbon atoms. One valence electron is left free for each carbon atom since each carbon atom possesses four valence electrons. By adding electric potential to these liberated electrons, they can easily flow within the crystalline structure of graphite. As a result, graphite is an excellent conductor of electricity.
Question 4: What does it imply when you say “denatured alcohol”? What exactly is the purpose of denatured alcohol?
Answer:
Denatured alcohol is alcohol that has been turned unfit by mixing it with harmful compounds such as methanol, pyridine, copper sulphate, and so on. Ethanol is a widely used chemical in industry. As a result, it was subjected to an extremely low excise duty. It is necessary to denature alcohol in order to prevent its overuse for drinking purposes.
Question 5: What structural differences exist between aldehyde and ketone molecules?
Answer:
The carbonyl group of an aldehyde is linked to one alkyl group (R) and one hydrogen atom, whereas the carbonyl group of a ketone is attached to two alkyl groups.
Question 6: What changes have been made to detergents’ composition to make them biodegradable?
Answer:
Detergents derived from long-chain hydrocarbons with the least amount of branching in their molecules breakdown faster.
Diamond and Graphite – Structure, Uses, Properties, Applications
Diamond and Graphite– The word “carbon” comes from the Latin word “carbo,” which means “charcoal.” It is the fourth most plentiful element in the universe and the second most abundant element in human bodies, which may come as a surprise to us (the first being oxygen).
In reality, all organic substances on the planet contain carbon in some form or element, which is why it is the foundation for the entire discipline of organic chemistry.
Table of Content
- Structure of Carbon
- What are Allotropes of Carbon?
- Diamond
- Structure of Diamond
- Applications of Diamond
- Graphite
- Structure of Graphite
- Applications of Graphite