UPPSC PCS 2025 · Question 79 of 150

Which of the following two are the major constituents of Bio-gas ? Methane Butane Carbon dioxide Carbon monoxide Select the correct answer from the code given below: Code:

General Knowledge

A1 and 2
B3 and 4
C1 and 3Correct
D2 and 3

Answer: C. 1 and 3

Explanation

Biogas is a mixture of gases produced by the anaerobic decomposition of organic matter such as cow dung, agricultural waste, and kitchen refuse. Its major constituents are: Methane (CH₄) – about 50–70% , which is the main combustible component.

Source: selfstudywala.com UPPCS Prelims 2025 GS Paper 1 detailed solution (based on UPPCS official answer key)

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