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 ?

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