Question

Liquefied petroleum gas (LPG) mainly contains

• A. Methane, Ethane
• B. Ethane, Propane
• C. Butane, Isobutane
• D. Ethene, Ethyne

Hint:

Remember the main components of common fuel gases:
- Natural Gas: Primarily Methane (C1).
- LPG: Primarily Propane (C3) and Butane (C4).
- Gasoline: A mix of hydrocarbons from C4 to C12.

Answer 1

The Correct Option is C

Step 1: Understanding the Question:
We need to identify the primary chemical components of Liquefied Petroleum Gas (LPG).

Step 2: Key Formula or Approach:
This is a factual question about common fuels. LPG is a byproduct of petroleum refining and natural gas processing. Its composition varies but is primarily composed of low-molecular-weight alkanes.

Step 3: Detailed Explanation:
Liquefied Petroleum Gas (LPG) is a flammable mixture of hydrocarbon gases used as fuel.
The main components of LPG are

propane (\(C_3H_8\)) and

butane (\(C_4H_{10}\)). Butane itself exists as two isomers: n-butane and

isobutane. Commercial LPG is often a mix of these gases.
Let's analyze the options:
-

(A) Methane, Ethane: Methane (\(CH_4\)) is the primary component of natural gas, not LPG.
-

(B) Ethane, Propane: Propane is a major component, but ethane is typically a minor component. This is less accurate than other options.
-

(C) Butane, Isobutane: Both n-butane and its isomer, isobutane, are major components of LPG, often blended with propane. This is the best description among the choices.
-

(D) Ethene, Ethyne: These are unsaturated hydrocarbons (alkenes and alkynes) and are not the main constituents of LPG.

Step 4: Final Answer:
LPG mainly contains Butane and Isobutane (along with Propane).