aromatic hydrocarbons
Which is obtained from coal?
Coke and its Uses
Coke is a high-carbon product obtained by the destructive distillation of coal. The amount of carbon content in coke is so high that it is said to be an almost pure form of carbon. Coke is greyish-black in colour and is a hard, porous solid.
Is coal tar obtained from petroleum?
Coal tar also produces naphthalene balls used to resist insects and other insects. A bitumen petroleum product is used in place of coal tar to metallize the roads these days.
What are the product obtained from coal?
- Coal tar: Used for making drugs, dyes, perfumes, paints etc.
- Coal gas: Used as an industrial fuel.
- Ammonical liquor: Used in various industries for making chemicals, fertilisers etc.
- Coke: Used in manufacturing of steel and extraction of many metals.
Where is coal tar found?
Coal tar is derived from coal. It is a byproduct of the production of coke, a solid fuel that contains mostly carbon, and coal gas. Coal tar is used primarily for the production of refined chemicals and coal-tar products, such as creosote and coal-tar pitch.
How is coal tar obtained Class 8?
Coal Tar. It is a thick, black liquid having an unpleasant smell which is obtained by heating coal in the absence of air. (1) It is a mixture of about 200 carbon compounds or organic compounds. (2) The useful carbon compounds present in coal tar includes benzene, toluene, naphthalene, anthracene, phenol and aniline.
How do we get CNG?
CNG is produced by compressing natural gas to less than 1% of its volume at standard atmospheric pressure. To provide adequate driving range, CNG is stored onboard a vehicle in a compressed gaseous state at a pressure of up to 3,600 pounds per square inch. CNG is used in light-, medium-, and heavy-duty applications.
What are the main constituents of coal tar?
Coal tar is a complex mixture of a larger number of aromatic hydrocarbons (benzene, naphthalene, anthracene, phenanthrene and their homologues), aromatic acids and nitrogen-containing compounds and it transpired that it was better to study the carcinogenic effect of separate fractions obtained by distillation at …
Is naphthalene balls obtained from coal tar?
Naphthalene is flammable and potentially explosive. Hence, Naphthalene balls are obtained from coal tar. The labelled use of mothballs is to kill moths and other fibre insects to protect clothing.
Which of the following is product obtained from coal tar?
Coal tar is used to make synthetic dyes, drugs, and perfumes purposes. Hence option D is correct.
What is coal tar extract?
This medication is used on the hair/scalp to treat dandruff and other scaly, itchy skin conditions (psoriasis or seborrheic dermatitis). Coal tar belongs to a class of drugs known as keratoplastics. It works by causing the skin to shed dead cells from its top layer and slow down the growth of skin cells.
What is difference between CNG and LPG?
CNG and LPG fuel also have both similarities and differences. While CNG is comprised of methane, LPG is comprised of propane and butane. CNG is typically used as a substitute for gasoline in automobiles, while LPG is often used in the industrial, refrigeration, agricultural and catering industries.
How is LPG produced?
LPG is produced during oil refining or is extracted during the natural gas production process. If you release LPG, gas is emitted. In order to transport it, LPG needs to be placed under modest pressure to form a liquid. It can then be stored and transported in LPG cylinders.
Is coal tar the purest form of coal?
coal tar.
What is the difference between LNG and CNG?
LNG means liquefied natural gas. CNG means compressed natural gas. The key point – and the reason there are two fuels, not one – is that gas has different energy densities in different states. One unit of liquid gas energy takes up 3 times less volume than one unit of compressed gas energy.
Which gas is obtained during the processing of coal?
Coal gas is produced during the processing of coal which is the mixture of methane and hydrogen with some carbon dioxide. Was this answer helpful?
Do mothballs sublimate?
A: Mothballs are made of naphthalene, a substance that undergoes sublimation at room temperature. The solid mothballs slowly changed to a gas during the summer months, explaining why they were much smaller by autumn.
Is naphthalene a liquid?
Naphthalene (NAF-thuh-leen) is a white crystalline volatile solid with a characteristic odor often associated with mothballs. The compound sublimes (turns from a solid to a gas) slowly at room temperature, producing a vapor that is highly combustible.
Which of the product is not obtained during coal processing?
CNG is not obtained from coal. CNG is a fuel which can be used in replacement of diesel, petrol & LPG (liquefied petroleum gas).
Which of the following is not obtained from coal tar?
Vegetable oil is not obtained.
Which of the following is not obtained from coal?
Which of the following is not obtained from coal? Answer. (d) CNG (Compressed Natural Gas) is not obtained from coal. Note :Natural gas is formed under the earth by the decomposition of vegetable matter lying under water.
What is coal tar What are its uses?
Answer: Coaltar is a thick black viscous liquid which is the by-product of the production of coke and coal gas. It has both medical and industrial uses. E.g.:-Coaltar’s medication is used to prevent itching,scaling,flaking due to skin conditions. Coaltar belongs to a class of drugs known as keratoplastics.
Is coal tar soluble in water?
Coal tar is completely or nearly completely soluble in benzene and nitrobenzene and it is partially soluble in acetone, carbon disulfide, chloroform, diethyl ether, ethanol, methanol, petroleum ether, hexane, and sodium hydroxide solution, and slightly soluble in water.
What is the most impure form of coal?
charcoal, impure form of graphitic carbon, obtained as a residue when carbonaceous material is partially burned, or heated with limited access of air.
Which coal is pure coal?
Anthracite is the purest form of coal, having the highest degree of coalification, the highest carbon count and energy content and the fewest impurities. Anthracite contains nearly 95% of carbon and it’s the purest form of coal than any other options.
Which is the most inferior form of coal?
Peat is the most inferior form of coal.
What is PNG fuel?
LPG is Liquefied Petroleum Gas and PNG is Piped Natural Gas. LPG is supplied in liquid form just as the name suggests in cylinders whereas PNG is supplied through a pipeline. LPG is used as a fuel in heating appliances and vehicles, where as PNG is used for cooking (gas stoves) and heating water (gas geysers).
What is the full form of CNG?
Compressed Natural Gas (CNG), is natural gas under pressure which remains clear, odourless, and non-corrosive. It is also a cheaper, greener, and more efficient alternative to the traditional petrol and diesel fuels for vehicles.
How is LPG made in India?
LPG is produced during fractional distillation of crude oil or is separated during natural gas processing. To transport or store it, LPG gas needs to be liquefied under pressure. LPG can be stored or transported in LPG gas cylinders or vessels. If released from pressure, LPG gas is emitted.
Who invented LPG gas?
Liquid petroleum gases were discovered in 1912 when Dr. Walter Snelling, an American scientist, realized that these gases could be changed into liquids and stored under moderate pressure. From 1912 and 1920, LP-gas uses were developed.
What gas is methane?
What is methane? Methane (CH4) is a colorless, odorless and highly flammable gas. It is composed of carbon and hydrogen. It is also a potent greenhouse gas, meaning it affects climate change by contributing to increased warming, according to the US Environmental Protection Agency.
What is R LNG?
RLNG means re-gasified liquefied natural gas.
Is LNG same as LPG?
Difference between LNG and LPG is that they are different gases and the difference in LPG vs LNG container vessel storage. LNG (liquefied natural gas) is methane whilst LPG (liquefied petroleum gas) is propane, butane or a mixture of the two.
How is LNG produced?
A coolant, chilled by giant refrigerators, absorbs the heat from the natural gas. It cools the gas to -162°C, shrinking its volume by 600 times. This turns it into a clear, colourless, non-toxic liquid – liquefied natural gas, or LNG – that is much easier to store and transport.
Which gas is used in LPG?
LPG is the generic name of the butane and propane gases and their mixtures in different proportions. In Turkey, LPG used in household gas cylinders consists of 70% butane and 30% propane.
How are coal and petroleum formed?
Coal and petroleum are formed as a result of degradation of ancient plant life which lived millions of years ago. These dead plant matter started to pile up, eventually forming a substance called peat. Over time, heat and pressure from geological processes transformed these materials into coal.
Which is obtained by destructive distillation of coal?
Coke, coal gas, gaseous carbon, coal tar, ammonia liquor, and coal oil are examples of commercial products historically produced by the destructive distillation of coal.
What happens when coal is heated in the air?
If coal is heated in the presence of air, then coal burns to produce mainly carbon dioxide gas and no other useful products were obtained. It is a gaseous fuel which is obtained by the strong heating of coal in the absence of air during the processing of coal to get the coke.
Is bromine a sublime?
General Science
Bromine is already a liquid at room temperature and hence will not sublime….
Is camphor a sublimate?
Camphor converts directly into its gaseous state without converting into liquid state. This property of camphor helps to separate it from NaCl. The process is called sublimation.
Does naphthalene melt or sublime?
Naphthalene is a solid that sublimes at standard atmospheric temperature with the sublimation point at around 80 °C or 176 °F. At low temperature, its vapour pressure is high enough, 1 mmHg at 53 °C, to make the solid form of naphthalene evaporate into gas.
Is naphthalene covalent or ionic?
Naphthalene is a covalent molecule, because it is only consists of carbon-hydrogen bonds, but it is not a complex molecule. Carbon and hydrogen are nonmetals with similar levels of electronegativity.
Who invented naphthalene?
Naphthalene’s chemical formula was determined by Michael Faraday in 1826. The structure of two fused benzene rings was proposed by Emil Erlenmeyer in 1866, and confirmed by Carl Gräbe three years later.
Who discovered naphthalene?
Naphthalene, discovered in 1819 by A. Garden (BUA, 1989), is a natural constituent of coal tar and crude oil, which are major contributors to its presence in the environment. They contain up to 11% and 1.3% of the chemical, respectively (BUA, 1989; O’Neil et al., 2001).
Which of the following is not obtained by the destructive distillation of coal?
Answer : Coal gas, Coke and Coal tar are obtained in the process of destructive distillation of mineral coal but methane is not obtained during this process. Hence, the correct option is B.
What is the almost pure form of carbon?
Coke is almost pure form of carbon.
Why is CNG called clean fuel?
Compressed natural gas (CNG) is a clean fuel because the fuel naturally occurs. It contains low amounts of nitrogen dioxide, carbon dioxide, and sulfur dioxide, which makes it environmentally friendly. As a result, it reduces the cases of respiratory problems and asthma attacks.
Why is petroleum called black gold?
Petroleum is referred to as ‘black gold’ because when crude oil is extracted from the land it is black in colour. People call it gold because of its oils and value. It is very difficult to find.
Is CNG made of petroleum?
Compressed Natural Gas (CNG)
Colourless, non-carcinogenic and non-toxic, CNG is inflammable and lighter than air. It is not a liquid fuel, and is not the same as LPG (Liquified Petroleum Gas), which consists of propane and butane in liquid form.
How can we obtain products from coal?
- Coal Gas is used as a fuel for cooking food.
- Coke is used as a fuel and as a reducing agent in steel manufacturing .
- Coal Tar is used to make plastics, paints, dyes, naphthalene balls and explosives.
What are the products obtained from coal?
- Coal tar: Used for making drugs, dyes, perfumes, paints etc.
- Coal gas: Used as an industrial fuel.
- Ammonical liquor: Used in various industries for making chemicals, fertilisers etc.
- Coke: Used in manufacturing of steel and extraction of many metals.
What are the products obtained from the processing of coal?
Coal when processed in industry gives coke, coal tar and coal gas. Coke is used in the manufacture of steel and in extraction of many metals. Coal tar is used as starting material for manufacturing various substances such as synthetic dyes, drugs, explosives, perfumes, paints, etc. Coal gas is used as a fuel.