CNG stands for which among the following?
Compressed natural gas
Understanding CNG: What Does CNG Stand For?
The question asks for the full form of the abbreviation CNG. CNG is a term commonly used, especially in the context of fuel and energy.
Let's look at the provided options:
- Cardiac nerve grid
- Coal and natural gases
- Compressed natural gas
- Chemically neutral gene
The correct full form of CNG is Compressed Natural Gas.
Compressed Natural Gas (CNG) is a fuel gas made primarily of methane ($\text{CH}_4$), compressed to less than 1% of the volume it occupies at standard atmospheric pressure. It is stored at high pressure, typically 20-25 MPa (2,900-3,600 psi). CNG is used as a cleaner alternative to gasoline and diesel fuel in vehicles.
Analysis of the Options
- Cardiac nerve grid: This relates to the nervous system of the heart and is completely unrelated to fuel or energy abbreviations.
- Coal and natural gases: While coal and natural gas are both fossil fuels, CNG specifically refers to natural gas that has been compressed. The term "coal and natural gases" describes two different types of fuel, not the compressed form of natural gas.
- Compressed natural gas: This is the widely accepted and correct full form for CNG, describing natural gas stored under high pressure for use as fuel.
- Chemically neutral gene: This relates to genetics and chemistry, specifically properties of genes, and has no connection to the fuel term CNG.
Why is Compressed Natural Gas Important?
CNG is considered a more environmentally friendly fuel compared to gasoline and diesel because it produces fewer harmful emissions. It is often used in public transport, taxis, and commercial vehicles in many parts of the world to help reduce air pollution in urban areas.
| Term | Full Form | Relevance to Question |
|---|---|---|
| CNG | Compressed Natural Gas | Correct answer |
| Cardiac nerve grid | N/A | Incorrect (Medical term) |
| Coal and natural gases | N/A | Incorrect (Describes two fuels) |
| Chemically neutral gene | N/A | Incorrect (Biology/Chemistry term) |
Revision Table: Key Terms and Meanings
| Term | Meaning/Description |
|---|---|
| CNG | Compressed Natural Gas |
| Natural Gas | Primarily Methane ($\text{CH}_4$) |
| Compression | Reducing volume by applying pressure |
| Fuel | Material used to produce energy |
| Emission | Substances released into the atmosphere |
Additional Information on Compressed Natural Gas
Compressed Natural Gas is a fuel that has gained popularity due to its lower emissions profile. Here are some additional points:
- Composition: It is mainly composed of methane (typically 80-95%), along with small amounts of ethane, propane, and other hydrocarbons.
- Source: It is sourced from natural gas wells, coal beds, and as a byproduct of oil extraction.
- Storage: Stored in cylindrical or spherical pressure vessels.
- Uses: Primarily used as a fuel for vehicles, including cars, buses, trucks, and trains. It can also be used in generators and other industrial applications.
- Safety: Natural gas is lighter than air, so in case of a leak, it tends to disperse quickly, reducing the risk of combustion in open areas compared to liquid fuels like gasoline or diesel. However, it is stored at high pressure, requiring robust storage tanks.
Understanding the full form of CNG as Compressed Natural Gas is important for anyone studying energy, environmental science, or transportation.
Important Questions from Chemistry in Everyday Life
The plastics which get deformed easily on heating are known as:
Milk becomes sour if kept outside the refrigerator in summer because of:
Which of the following is a ferrous mineral?
Which among the following methods do most Indian households use for obtaining safe drinking water?
Deficiency of which of the following causes weak bones and tooth decay?
