Sources of Energy MCQs

Q1. Among the following, which is a non-renewable energy source?

• A.Coal
• B.Wind
• C.Solar
• D.Tidal

Answer: A. Coal

To see why, recall that Coal forms over millions of years; current consumption far exceeds replenishment, so it is non-renewable. Wind, solar, and tidal continuously replenish from Sun/Moon energy. Hence the answer is A) Coal.

Q2. Which energy source has the LOWEST greenhouse gas emission per kWh during operation?

• A.Wind
• B.Natural gas
• C.Coal
• D.Diesel

Answer: A. Wind

That leaves only option A). Confirm with the chapter rule: Wind turbines emit virtually no GHG during operation. Natural gas, while cleaner than coal/diesel, still emits CO₂. Coal is highest, diesel high. So wind has the lowest direct operational emission among these (physics, chapter 'Sources of Energy'). Answer: A) Wind.

Q3. Which has the LOWEST greenhouse-gas emission per kWh during operational use?

• A.Nuclear
• B.Coal
• C.Natural gas
• D.Diesel

Answer: A. Nuclear

NCERT fact (physics, chapter 'Sources of Energy'): Nuclear emits essentially zero CO2 during operation (small life-cycle emissions from construction/fuel processing). Trap fossil-fuel options have orders of magnitude higher CO2 per kWh. Final answer - A) Nuclear.