Question

The two non-renewable sources of energy are

• A. Gobar gas and biomass
• B. Coal and petroleum
• C. Biomass and petroleum
• D. None of these

Hint:

All fossil fuels—coal, petroleum (oil), and natural gas—are non-renewable. Most energy sources derived from plants or animal waste (biomass, gobar gas) are renewable.

Answer 1

The Correct Option is B

Step 1: Understanding the Concept:
Energy sources are classified as renewable or non-renewable.
\[\begin{array}{rl} \bullet & \text{Renewable sources can be replenished naturally in a short period (e.g., solar, wind, biomass).} \\ \bullet & \text{Non-renewable sources are finite and formed over millions of years, so they cannot be replenished on a human timescale (e.g., fossil fuels).} \\ \end{array}\]

Step 2: Detailed Explanation:
Let's analyze the options: \[\begin{array}{rl} \bullet & \text{Gobar gas and biomass: Both are derived from organic matter and are considered renewable.} \\ \bullet & \text{Coal and petroleum: Both are fossil fuels, formed from the remains of ancient organisms over millions of years. They are non-renewable.} \\ \bullet & \text{Biomass and petroleum: Biomass is renewable, while petroleum is non-renewable.} \\ \end{array}\] The question asks for a pair of non-renewable sources.

Step 3: Final Answer:
Coal and petroleum are both non-renewable sources of energy.