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Q11 (CAPF/2008) Science & Technology › Basic Science (Physics, Chemistry, Biology) › Applied everyday chemistry Answer Verified

Consider the following statements— 1. The main constituent of LPG is Butane. 2. The main constituent of Biogas is Methane. Which of the statements given above is/are correct ?

Result
Your answer: —  ·  Correct: C
Explanation

Liquefied Petroleum Gas (LPG) is a mixture of flammable hydrocarbon gases, primarily composed of propane and butane [t1][t8]. While the exact ratio varies by region and application, butane (C4H10) is a major constituent, often being the dominant component in domestic cylinders to manage vapor pressure [t1][t7]. Biogas is a renewable fuel produced through the anaerobic digestion of organic matter [t2][t3]. Its primary constituent is methane (CH4), typically making up 50% to 70% of the total volume, with carbon dioxide (CO2) being the second most significant component [c2][t3][t5]. Methane is also the main component of Compressed Natural Gas (CNG) [c2][c3]. Since butane is the primary constituent of LPG and methane is the primary constituent of biogas, both statements are scientifically accurate.

Sources

  1. [1] https://ww2.arb.ca.gov/our-work/programs/alternative-fuels/alternative-fuels-liquefied-petroleum-gas-lpg
  2. [2] https://www.sciencedirect.com/science/article/pii/S2211715624002455
  3. [3] Science , class X (NCERT 2025 ed.) > Chapter 4: Carbon and its Compounds > 4.1 BONDING IN CARBON – THE COVALENT BOND > p. 60
  4. [4] Environment and Ecology, Majid Hussain (Access publishing 3rd ed.) > Chapter 9: Distribution of World Natural Resources > natural gas as a Resource > p. 15
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SIMILAR QUESTIONS

IAS · 2005 · Q61 Relevance score: 3.18

Consider the following statements: 1. Liquefied Natural Gas (LNG) is liquefied under extremely cold temperatures and high pressure to facilitate storage or transportation in specially designed vessels. 2. Fist LNG terminal in India was built in Hassan. 3. Natural Gas Liquids (NGL) are separated from LPG and these include ethane, propane, butane and natural gasoline. Which of the statements is/are correct?

CDS-II · 2017 · Q22 Relevance score: 2.43

What are the main constituents of biogas?

IAS · 2014 · Q38 Relevance score: 2.35

With reference to two non-conventional energy sources called 'coalbed methane' and 'shale gas', consider the following statements : 1. Coalbed methane is the pure methane gas extracted from coal seams, while shale gas is a mixture of propane and butane only that can be extracted from fine-grained sedimentary rocks. 2. In India, abundant coalbed methane sources exist, but so far no shale gas sources have been found. Which of the statements given above is/are correct?

CDS-I · 2022 · Q24 Relevance score: 2.21

Which one of the following statements about biogas is not correct ?

IAS · 2005 · Q36 Relevance score: 2.11

Assertion (A) : The main constituent of the Liquefied Petroleum Gas is methane. Reason (R) : Methane can be used directly for burning in homes and factories where it can be supplied through pipelines.